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Magnetics

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The vertical component of the earth's magnetic field is $$6 \times 10^{-5} \mathrm{~T}$$ at any place where the angle of...
JEE Main 2022 (Online) 29th July Evening Shift
A wire X of length $$50 \mathrm{~cm}$$ carrying a current of $$2 \mathrm{~A}$$ is placed parallel to a long wire $$\math... JEE Main 2022 (Online) 29th July Evening Shift The magnetic field at the center of current carrying circular loop is$$B_{1}$$. The magnetic field at a distance of$$\...
JEE Main 2022 (Online) 28th July Evening Shift
A triangular shaped wire carrying $$10 \mathrm{~A}$$ current is placed in a uniform magnetic field of $$0.5 \mathrm{~T}... JEE Main 2022 (Online) 28th July Evening Shift As shown in the figure, a metallic rod of linear density$$0.45 \mathrm{~kg} \mathrm{~m}^{-1}$$is lying horizontally on... JEE Main 2022 (Online) 28th July Morning Shift The current sensitivity of a galvanometer can be increased by : (A) decreasing the number of turns (B) increasing the ma... JEE Main 2022 (Online) 28th July Morning Shift Identify the correct statements from the following descriptions of various properties of electromagnetic waves. (A) In a... JEE Main 2022 (Online) 27th July Evening Shift A cyclotron is used to accelerate protons. If the operating magnetic field is$$1.0 \mathrm{~T}$$and the radius of the ... JEE Main 2022 (Online) 27th July Evening Shift A compass needle of oscillation magnetometer oscillates 20 times per minute at a place$$\mathrm{P}$$of$$\operatorname...
JEE Main 2022 (Online) 27th July Evening Shift
A beam of light travelling along $$X$$-axis is described by the electric field $$E_{y}=900 \sin \omega(\mathrm{t}-x / c)... JEE Main 2022 (Online) 27th July Morning Shift A magnet hung at$$45^{\circ}$$with magnetic meridian makes an angle of$$60^{\circ}$$with the horizontal. The actual ... JEE Main 2022 (Online) 27th July Morning Shift Two bar magnets oscillate in a horizontal plane in earth's magnetic field with time periods of$$3 \mathrm{~s}$$and$$4...
JEE Main 2022 (Online) 27th July Morning Shift
A velocity selector consists of electric field $$\vec{E}=E \,\hat{k}$$ and magnetic field $$\vec{B}=B \,\hat{j}$$ with $... JEE Main 2022 (Online) 26th July Evening Shift Two concentric circular loops of radii $$r_{1}=30 \mathrm{~cm}$$ and $$r_{2}=50 \mathrm{~cm}$$ are placed in $$\mathrm{X... JEE Main 2022 (Online) 26th July Evening Shift$$\mathrm{B}_{X}$$and$$\mathrm{B}_{\mathrm{Y}}$$are the magnetic fields at the centre of two coils$$\mathrm{X}$$and... JEE Main 2022 (Online) 26th July Morning Shift A charge particle is moving in a uniform magnetic field$$(2 \hat{i}+3 \hat{j}) \,\mathrm{T}$$. If it has an acceleratio... JEE Main 2022 (Online) 26th July Morning Shift An electron with energy 0.1 keV moves at right angle to the earth's magnetic field of 1$$\times$$10$$-$$4 Wbm$$-$$2. T... JEE Main 2022 (Online) 25th July Evening Shift The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by... JEE Main 2022 (Online) 25th July Morning Shift Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to... JEE Main 2022 (Online) 25th July Morning Shift A coil of n number of turns wound tightly in the form of a spiral with inner and outer radii r1 and r2 respectively. Whe... JEE Main 2022 (Online) 30th June Morning Shift The magnetic field at the centre of a circular coil of radius r, due to current I flowing through it, is B. The magnetic... JEE Main 2022 (Online) 24th June Morning Shift Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)... JEE Main 2022 (Online) 24th June Morning Shift An electric bulb is rated as 200 W. What will be the peak magnetic field at 4 m distance produced by the radiations comi... JEE Main 2022 (Online) 24th June Evening Shift A proton, a deutron and an$$\alpha$$-particle with same kinetic energy enter into a uniform magnetic field at right ang... JEE Main 2022 (Online) 24th June Evening Shift The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has JEE Main 2022 (Online) 24th June Evening Shift A long straight wire with a circular cross-section having radius R, is carrying a steady current I. The current I is uni... JEE Main 2022 (Online) 25th June Morning Shift A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number ... JEE Main 2022 (Online) 25th June Evening Shift Given below are two statements : Statement I : Susceptibilities of paramagnetic and ferromagnetic substances increase wi... JEE Main 2022 (Online) 25th June Evening Shift A metal surface is illuminated by a radiation of wavelength 4500$$\mathop A\limits^o $$. The ejected photo-electron ent... JEE Main 2022 (Online) 26th June Evening Shift A metallic conductor of length 1 m rotates in a vertical plane parallel to east-west direction about one of its end with... JEE Main 2022 (Online) 26th June Evening Shift A bar magnet having a magnetic moment of 2.0$$\times$$105 JT$$-$$1, is placed along the direction of uniform magnetic ... JEE Main 2022 (Online) 26th June Evening Shift A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to t... JEE Main 2022 (Online) 26th June Morning Shift The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m, is : [Permeability of f... JEE Main 2022 (Online) 27th June Morning Shift A radar sends an electromagnetic signal of electric field (E0) = 2.25 V/m and magnetic field (B0) = 1.5$$\times$$10$$-... JEE Main 2022 (Online) 28th June Morning Shift An infinitely long hollow conducting cylinder with radius R carries a uniform current along its surface. Choose the corr... JEE Main 2022 (Online) 28th June Morning Shift A coil is placed in a time varying magnetic field. If the number of turns in the coil were to be halved and the radius o... JEE Main 2022 (Online) 28th June Evening Shift Two parallel, long wires are kept 0.20 m apart in vacuum, each carrying current of x A in the same direction. If the for... JEE Main 2022 (Online) 28th June Evening Shift The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility ... JEE Main 2022 (Online) 28th June Evening Shift Given below are two statements : Statement I : The electric force changes the speed of the charged particle and hence ch... JEE Main 2022 (Online) 29th June Evening Shift Two long current carrying conductors are placed to each other at a distance of 8 cm between them. The magnitude of magne... JEE Main 2022 (Online) 29th June Evening Shift At a certain place the angle of dip is 30$$^\circ$$ and the horizontal component of earth's magnetic field is 0.5 G. The... JEE Main 2022 (Online) 29th June Morning Shift A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge... JEE Main 2022 (Online) 29th June Morning Shift There are two infinitely long straight current carrying conductors and they are held at right angles to each other so th... JEE Main 2021 (Online) 1st September Evening Shift Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by E = 20cos(2 $$\times... JEE Main 2021 (Online) 1st September Evening Shift Following plots show magnetization (M) vs magnetizing field (H) and magnetic susceptibility ($$\chi $$) vs temperature (... JEE Main 2021 (Online) 1st September Evening Shift A square loop of side 20 cm and resistance 1$$\Omega$$is moved towards right with a constant speed v0. The right arm of... JEE Main 2021 (Online) 1st September Evening Shift A coil is placed in a magnetic field$$\overrightarrow B $$as shown below :A current is induced in the coil because$$\... JEE Main 2021 (Online) 31st August Evening Shift The magnetic field vector of an electromagnetic wave is given by $$B = {B_0}{{\widehat i + \widehat j} \over {\sqrt 2 }}... JEE Main 2021 (Online) 31st August Evening Shift A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle ... JEE Main 2021 (Online) 31st August Evening Shift A coil having N turns is wound tightly in the form of a spiral with inner and outer radii 'a' and 'b' respectively. Find... JEE Main 2021 (Online) 31st August Morning Shift A coaxial cable consists of an inner wire of radius 'a' surrounded by an outer shell of inner and outer radii 'b' and 'c... JEE Main 2021 (Online) 27th August Evening Shift A constant magnetic field of 1T is applied in the x &gt; 0 region. A metallic circular ring of radius 1m is moving with ... JEE Main 2021 (Online) 27th August Evening Shift Two ions of masses 4 amu and 16 amu have charges +2e and +3e respectively. These ions pass through the region of constan... JEE Main 2021 (Online) 27th August Morning Shift A bar magnet is passing through a conducting loop of radius R with velocity$$\upsilon $$. The radius of the bar magnet ... JEE Main 2021 (Online) 27th August Morning Shift A light beam is described by$$E = 800\sin \omega \left( {t - {x \over c}} \right)$$. An electron is allowed to move nor... JEE Main 2021 (Online) 26th August Evening Shift The fractional change in the magnetic field intensity at a distance 'r' from centre on the axis of current carrying coil... JEE Main 2021 (Online) 26th August Morning Shift Figure A and B shown to long straight wires of circular cross-section (a and b with a &lt; b), carrying current I which ... JEE Main 2021 (Online) 27th July Evening Shift Two ions having same mass have charges in the ratio 1 : 2. They are projected normally in a uniform magnetic field with ... JEE Main 2021 (Online) 25th July Evening Shift A linearly polarized electromagnetic wave in vacuum is$$E = 3.1\cos \left[ {(1.8)z - (5.4 \times {{10}^6})t} \right]\wi... JEE Main 2021 (Online) 25th July Morning Shift Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet.Sta... JEE Main 2021 (Online) 22th July Evening Shift Intensity of sunlight is observed as 0.092 Wm$$-$$2 at a point in free space. What will be the peak value of magnetic fi... JEE Main 2021 (Online) 22th July Evening Shift Choose the correct option JEE Main 2021 (Online) 22th July Evening Shift The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$$\pi$$ $$\times$$ 10$$-$$7 H/m. A... JEE Main 2021 (Online) 20th July Evening Shift At an angle of 30$$^\circ$$ to the magnetic meridian, the apparent dip is 45$$^\circ$$. Find the true dip : JEE Main 2021 (Online) 20th July Evening Shift In an electromagnetic wave the electric field vector and magnetic field vector are given as $$\overrightarrow E = {E_0}... JEE Main 2021 (Online) 20th July Evening Shift The arm PQ of a rectangular conductor is moving from x = 0 to x = 2b outwards and then inwards from x = 2b to x = 0 as s... JEE Main 2021 (Online) 20th July Morning Shift A deuteron and an alpha particle having equal kinetic energy enter perpendicularly into a magnetic field. Let rd and r$$... JEE Main 2021 (Online) 20th July Morning Shift Which of the following statements are correct?(A) Electric monopoles do not exist whereas magnetic monopoles exist.(B) M... JEE Main 2021 (Online) 18th March Evening Shift A plane electromagnetic wave propagating along y-direction can have the following pair of electric field $$\left( {\over... JEE Main 2021 (Online) 18th March Evening Shift A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect... JEE Main 2021 (Online) 18th March Morning Shift Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If the magnetic field at... JEE Main 2021 (Online) 18th March Morning Shift A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point i... JEE Main 2021 (Online) 18th March Morning Shift A hairpin like shape as shown in figure is made by bending a long current carrying wire. What is the magnitude of a magn... JEE Main 2021 (Online) 17th March Evening Shift A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry a... JEE Main 2021 (Online) 17th March Morning Shift The magnetic field in a region is given by$$\overrightarrow B = {B_o}\left( {{x \over a}} \right)\widehat k$$. A squar... JEE Main 2021 (Online) 16th March Evening Shift A charge Q is moving$$\overrightarrow {dl} $$distance in the magnetic field$$\overrightarrow {B} $$. Find the value o... JEE Main 2021 (Online) 16th March Evening Shift A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure Two resistors R1 a... JEE Main 2021 (Online) 16th March Morning Shift For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue)... JEE Main 2021 (Online) 16th March Morning Shift A bar manet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north... JEE Main 2021 (Online) 16th March Morning Shift A plane electromagnetic wave of frequency 500 MHz is travelling in vacuum along y-direction. At a particular point in sp... JEE Main 2021 (Online) 16th March Morning Shift An aeroplane, with its wings spread 10 m, is flying at a speed of 180 km/h in a horizontal direction. The total intensit... JEE Main 2021 (Online) 26th February Evening Shift In a ferromagnetic material, below the curie temperature, a domain is defined as : JEE Main 2021 (Online) 25th February Evening Shift Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2 m from the centre are in th... JEE Main 2021 (Online) 25th February Morning Slot A proton, a deuteron and an$$\alpha$$particle are moving with same momentum in a uniform magnetic field. The ratio of ... JEE Main 2021 (Online) 25th February Morning Slot A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains : JEE Main 2021 (Online) 24th February Evening Slot A square loop of side 2$$a$$and carrying current I is kept in xz plane with its centre at origin. A long wire carrying ... JEE Main 2020 (Online) 6th September Evening Slot A charged particle going around in a circle can be considered to be a current loop. A particle of mass m carrying charge... JEE Main 2020 (Online) 6th September Evening Slot For a plane electromagnetic wave, the magnetic field at a point x and time t is$$\overrightarrow B \left( {x,t} \right)... JEE Main 2020 (Online) 6th September Evening Slot A particle of charge q and mass m is moving with a velocity $$- v\widehat i$$ (v $$\ne$$ 0) towards a large screen pl... JEE Main 2020 (Online) 6th September Morning Slot An electron is moving along +x direction with a velocity of 6 $$\times$$ 106 ms–1. It enters a region of uniform elec... JEE Main 2020 (Online) 6th September Morning Slot An infinitely long, straight wire carrying current I, one side opened rectangular loop and a conductor C with a sliding ... JEE Main 2020 (Online) 5th September Evening Slot A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of... JEE Main 2020 (Online) 5th September Evening Slot An iron rod of volume 10–3 m3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a curr... JEE Main 2020 (Online) 5th September Evening Slot The quantities x = $${1 \over {\sqrt {{\mu _0}{\varepsilon _0}} }}$$, y = $${E \over B}$$ and z = $${l \over {CR}}$$ are... JEE Main 2020 (Online) 5th September Evening Slot A square loop of side 2$$a$$, and carrying current I, is kept in XZ plane with its centre at origin. A long wire carryin... JEE Main 2020 (Online) 5th September Morning Slot An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of e... JEE Main 2020 (Online) 5th September Morning Slot A paramagnetic sample shows a net magnetisation of 6 A/m when it is placed in an external magnetic field of 0.4 T at a t... JEE Main 2020 (Online) 4th September Evening Slot The electric field of a plane electromagnetic wave is given by $$\overrightarrow E = {E_0}\left( {\widehat x + \widehat... JEE Main 2020 (Online) 4th September Evening Slot A circular coil has moment of inertia 0.8 kg m2 around any diameter and is carrying current to produce a magnetic momen... JEE Main 2020 (Online) 4th September Evening Slot A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The w... JEE Main 2020 (Online) 3rd September Evening Slot A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance... JEE Main 2020 (Online) 3rd September Evening Slot Magnitude of magnetic field (in SI units) at the centre of a hexagonal shape coil of side 10 cm, 50 turns and carrying c... JEE Main 2020 (Online) 3rd September Morning Slot An elliptical loop having resistance R, of semi major axis a, and semi minor axis b is placed in magnetic field as shown... JEE Main 2020 (Online) 3rd September Morning Slot A charged particle carrying charge 1$$\mu $$C is moving with velocity$$\left( {2\widehat i + 3\widehat j + 4\widehat k... JEE Main 2020 (Online) 3rd September Morning Slot A wire carrying current I is bent in the shape ABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to ea... JEE Main 2020 (Online) 2nd September Evening Slot The figure shows a region of length ‘l’ with a uniform magnetic field of 0.3 T in it and a proton entering the region wi... JEE Main 2020 (Online) 2nd September Evening Slot A beam of protons with speed 4 × 105 ms–1 enters a uniform magnetic field of 0.3 T at an angle of 60° to the magnetic fi... JEE Main 2020 (Online) 2nd September Morning Slot Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of t... JEE Main 2020 (Online) 2nd September Morning Slot A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and having radius 2 cm and another wire B, ... JEE Main 2020 (Online) 4th September Morning Slot A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of... JEE Main 2020 (Online) 4th September Morning Slot A small bar magnet placed with its axis at 30o with an external field of 0.06 T experiences a torque of 0.018 Nm. The mi... JEE Main 2020 (Online) 4th September Morning Slot A small circular loop of conducting wire has radius a and carries current I. It is placed in a uniform magnetic field B ... JEE Main 2020 (Online) 9th January Evening Slot A plane electromagnetic wave is propagating along the direction $${{\widehat i + \widehat j} \over {\sqrt 2 }}$$ , with ... JEE Main 2020 (Online) 9th January Evening Slot An electron gun is placed inside a long solenoid of radius R on its axis. The solenoid has n turns/length and carries a ... JEE Main 2020 (Online) 9th January Evening Slot A charged particle of mass 'm' and charge 'q' moving under the influence of uniform electric field $$E\overrightarrow i ... JEE Main 2020 (Online) 9th January Morning Slot The electric fields of two plane electromagnetic plane waves in vacuum are given by$$\overrightarrow {{E_1}} = {E_0}\w... JEE Main 2020 (Online) 9th January Morning Slot A long, straight wire of radius a carries a current distributed uniformly over its cross-section. The ratio of the magne... JEE Main 2020 (Online) 9th January Morning Slot A very long wire ABDMNDC is shown in figure carrying current I. AB and BC parts are straight, long and at right angle. A... JEE Main 2020 (Online) 8th January Evening Slot A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point i... JEE Main 2020 (Online) 8th January Evening Slot At time t = 0 magnetic field of 1000 Gauss is passing perpendicularly through the area defined by the closed loop shown ... JEE Main 2020 (Online) 8th January Morning Slot Photon with kinetic energy of 1MeV moves from south to north. It gets an acceleration of 1012 m/s2 by an applied magneti... JEE Main 2020 (Online) 8th January Morning Slot The electric field of a plane electromagnetic wave is given by $$\overrightarrow E = {E_0}{{\widehat i + \widehat j} \o... JEE Main 2020 (Online) 7th January Evening Slot A planar loop of wire rotates in a uniform magnetic field. Initially at t = 0, the plane of the loop is perpendicular to... JEE Main 2020 (Online) 7th January Evening Slot The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, coercivity and ... JEE Main 2020 (Online) 7th January Evening Slot A particle of mass m and charge q has an initial velocity$$\overrightarrow v = {v_0}\widehat j$$. If an electric fiel... JEE Main 2020 (Online) 7th January Evening Slot If the magnetic field in a plane electromagnetic wave is given by$$\overrightarrow B $$= 3$$ \times $$10-8 sin(1.6 ... JEE Main 2020 (Online) 7th January Morning Slot Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5A. (See figur... JEE Main 2019 (Online) 12th April Evening Slot An electron, moving along the x-axis with an initial energy of 100 eV, enters a region of magnetic field$$\overrightarr... JEE Main 2019 (Online) 12th April Evening Slot A magnetic compass needle oscillates 30 times per minute at a place where the dip is 45o, and 40 times per minute where ... JEE Main 2019 (Online) 12th April Morning Slot An electromagnetic wave is represented by the electric field $$\overrightarrow E = {E_0}\widehat n\sin \left[ {\omega t... JEE Main 2019 (Online) 12th April Morning Slot The figure shows a square loop L of side 5 cm which is connected to a network of resistances. The whole setup is moving ... JEE Main 2019 (Online) 12th April Morning Slot A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 ... JEE Main 2019 (Online) 12th April Morning Slot The magnitude of the magnetic field at the centre of an equilateral triangular loop of side 1 m which is carrying a curr... JEE Main 2019 (Online) 10th April Evening Slot A square loop is carrying a steady current I and the magnitude of its magnetic dipole moment is m. if this square loop i... JEE Main 2019 (Online) 10th April Evening Slot A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magneti... JEE Main 2019 (Online) 10th April Morning Slot A moving coil galvanometer has a coil with 175 turns and area 1 cm2. It uses a torsion band of torsion constant 10–6 N-m... JEE Main 2019 (Online) 9th April Evening Slot Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P', a magnetic flux of 1... JEE Main 2019 (Online) 9th April Evening Slot A rectangular coil (Dimension 5 cm × 2.5 cm) with 100 turns, carrying a current of 3 A in the clock-wise direction is ke... JEE Main 2019 (Online) 9th April Morning Slot The magnetic field of a plane electromagnetic wave is given by :$$$\overline B = {B_0}\widehat i\left[ {\cos (kz - \om...
JEE Main 2019 (Online) 9th April Morning Slot
A rigid square loop of side 'a' and carrying current I2 is lying on a horizontal surface near a long current I1 carrying...
JEE Main 2019 (Online) 9th April Morning Slot
Two magnetic dipoles X and Y are placed at a separation d, with their axes perpendicular to each other. The dipole momen...
JEE Main 2019 (Online) 8th April Evening Slot
The magnetic field of an electromagnetic wave is given by :- $$\mathop B\limits^ \to = 1.6 \times {10^{ - 6}}\cos \lef... JEE Main 2019 (Online) 8th April Evening Slot Two very long, straight, and insulated wires are kept at 90° angle from each other in xy-plane as shown in the figure. T... JEE Main 2019 (Online) 8th April Evening Slot A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a ... JEE Main 2019 (Online) 8th April Morning Slot A thin strip 10 cm long is on a U shaped wire of negligible resistance and it is connected to a spring of spring constan... JEE Main 2019 (Online) 8th April Morning Slot A circular coil having N turns and radius r carries a current I. It is held in the XZ plane in a magnetic field B$${\mat...
JEE Main 2019 (Online) 8th April Morning Slot
The mean intensity of radiation on the surface of the Sun is about 108 W/m2 . The rms value of the corresponding magnet...
JEE Main 2019 (Online) 12th January Evening Slot
A proton and an $$\alpha$$-particle (with their masses in the ratio of 1 : 4 and charges in the ratio of 1 : 2) are acc...
JEE Main 2019 (Online) 12th January Morning Slot
As shown in the figure, two infinitely long, identical wires are bent by 90o and placed in such a way that the segments ...
JEE Main 2019 (Online) 12th January Morning Slot
A particle of mass m and charge q is in an electric and magnetic field given by $$\overrightarrow E = 2\widehat i + 3\w... JEE Main 2019 (Online) 11th January Evening Slot The region between y = 0 and y = d contains a magnetic field$$\overrightarrow B = B\widehat z$$. A particle of mass m... JEE Main 2019 (Online) 11th January Evening Slot There are two long co-axial solenoids of same length$$l$$. The inner and outer coils have radii r1 and r2 and number of... JEE Main 2019 (Online) 11th January Morning Slot In an experiment, electrons are accelerated, from rest, by applying a voltage of 500 V. Calculate the radius of the path... JEE Main 2019 (Online) 11th January Morning Slot A hoop and a solid cylinder of same mass and radius are made of a permanent magnetic material with their magnetic moment... JEE Main 2019 (Online) 10th January Evening Slot At some location on earth the horizontal component of earth’s magnetic field is 18 × 10–6 T. At this location, magnetic ... JEE Main 2019 (Online) 10th January Evening Slot An insulating thin rod of length$$l$$has a linear charge density$$\rho \left( x \right)$$=$${\rho _0}{x \over l}$$... JEE Main 2019 (Online) 10th January Morning Slot A solid metal cube of edge length 2 cm is moving in a positive y-direction at a constant speed of 6 m/s. There is a unif... JEE Main 2019 (Online) 10th January Morning Slot A magnet of total magnetic moment 10-2$${\widehat i}$$A-m2 is placed in a time varying magnetic field, B$${\widehat i}$$... JEE Main 2019 (Online) 10th January Morning Slot One of the two identical conducting wires of length L is bent in the form of a circular loop and the other one into a ci... JEE Main 2019 (Online) 9th January Evening Slot A particle having the same charge as of electron moves in a ciurcular path of radius 0.5 cm under the influence of a mag... JEE Main 2019 (Online) 9th January Evening Slot The energy associated with electric field is (UE) and with magnetic field is (UB) for an electromagnetic wave in free sp... JEE Main 2019 (Online) 9th January Evening Slot A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2... JEE Main 2019 (Online) 9th January Morning Slot A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x-direction. At a particular ... JEE Main 2019 (Online) 9th January Morning Slot An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The r... JEE Main 2019 (Online) 9th January Morning Slot A conducting circular loop made of a thin wire, has area 3.5$$ \times $$10$$-$$3 m2 and resistance 10$$\Omega $$. It ... JEE Main 2019 (Online) 9th January Morning Slot A current loop, having two circular arcs joined by two radial lines is shown in the figure. It carries a current of 10 A... JEE Main 2019 (Online) 9th January Morning Slot A charge q is spread uniformly over an insulated loop of radius r. If it is rotated with an angular velocity$$\omega $... JEE Main 2018 (Online) 16th April Morning Slot A galvanometer with its coil resistance 25 $$\Omega$$ requires a current of 1 mA for its full deflection. In order to c... JEE Main 2018 (Online) 16th April Morning Slot A current of 1 A is flowing on the sides of an equilateral triangle of side 4.5 $$\times$$ 10-2 m. The magnetic field ... JEE Main 2018 (Online) 15th April Evening Slot The $$B$$-$$H$$ curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solended with $$... JEE Main 2018 (Online) 15th April Morning Slot A Helmholtz coil has a pair of loops, each with$$N$$turns and radius$$R$$. They are placed coaxially at distance$$R$...
JEE Main 2018 (Online) 15th April Morning Slot
The dipole moment of a circular loop carrying a current I, is m and the magnetic field at the centre of the loop is B1. ...
JEE Main 2018 (Offline)
An electron, a proton and an alpha particle having the same kinetic energy are moving in circular orbits of radii re, rp...
JEE Main 2018 (Offline)
A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm × 5 cm c...
JEE Main 2017 (Online) 9th April Morning Slot
A negative test charge is moving near a long straight wire carrying a current. The force acting on the test charge is pa...
JEE Main 2017 (Online) 9th April Morning Slot
Magnetic field in a plane electromagnetic wave is given by $$\overrightarrow B$$ = B0 sin (k x + $$\omega$$t) $$\wideh... JEE Main 2017 (Online) 8th April Morning Slot In a certain region static electric and magnetic fields exist. The magnetic field is given by$$\overrightarrow B = {B_...
JEE Main 2017 (Online) 8th April Morning Slot
A magnetic dipole in a constant magnetic field has :
JEE Main 2017 (Online) 8th April Morning Slot
When a current of 5 mA is passed through a galvanometer having a coil of resistance 15$$\Omega$$, it shows full scale d...
JEE Main 2017 (Offline)
A magnetic needle of magnetic moment 6.7 $$\times$$ 10-2 A m2 and moment of inertia 7.5 $$\times$$ 10-6 kg m2 is perform...
JEE Main 2017 (Offline)
A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 d...
JEE Main 2016 (Online) 10th April Morning Slot
Consider a thin metallic sheet perpendicular to the plane of the paper moving with speed ‘v’ in a uniform magnetic field...
JEE Main 2016 (Online) 10th April Morning Slot
A fighter plane of length 20 m, wing span (distance from tip of one wing to the tip of the other wing) of 15 m and heigh...
JEE Main 2016 (Online) 10th April Morning Slot
To know the resistance G of a galvanometer by half deflection method, a battery of emf VE and resistance R is used to de...
JEE Main 2016 (Online) 9th April Morning Slot
A 50 $$\Omega$$ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 $$\Omega$$ is to be used...
JEE Main 2016 (Online) 9th April Morning Slot
A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75o. One of the f...
JEE Main 2016 (Online) 9th April Morning Slot
Hysteresis loop for two magnetic materials $$A$$ and $$B$$ are given below : These materials are used to make magnets ...
JEE Main 2016 (Offline)
Two identical wires $$A$$ and $$B,$$ each of length $$'l'$$, carry the same current $$I$$. Wire $$A$$ is bent into a cir...
JEE Main 2016 (Offline)
A galvanometer having a coil resistance of $$100\,\Omega$$ gives a full scale deflection, when a currect of $$1$$ $$mA... JEE Main 2016 (Offline) A rectangular loop of sides$$10cm$$and$$5cm$$carrying a current$$1$$of$$12A$$is placed in different or... JEE Main 2015 (Offline) Two long current carrying thin wires, both with current$$I,$$are held by insulating threads of length$$L$$and are in... JEE Main 2015 (Offline) A conductor lies along the$$z$$-axis at$$ - 1.5 \le z &lt; 1.5\,m$$and carries a fixed current of$$10.0A$$in ... JEE Main 2014 (Offline) The coercivity of a small magnet where the ferromagnet gets demagnetized is$$3 \times {10^3}\,A{m^{ - 1}}.$$The curren... JEE Main 2014 (Offline) Two short bar magnets of length$$1cm$$each have magnetic moments$$1.20A{m^2}$$and$$1.00A{m^2}$$res... JEE Main 2013 (Offline) A charge$$Q$$is uniformly distributed over the surface of non-conducting disc of radius$$R.$$The disc rotates about ... AIEEE 2012 Proton, deuteron and alpha particle of same kinetic energy are moving in circular trajectories in a constant magnetic fi... AIEEE 2012 A current$$I$$flows in an infinitely long wire with cross section in the form of a semi-circular ring of radius$$R.$$... AIEEE 2011 Two long parallel wires are at a distance$$2d$$apart. They carry steady equal currents flowing out of the plane of the... AIEEE 2010 A current loop$$ABCD$$is held fixed on the plane of the paper as shown in the figure. The arcs$$BC$$(radius$$= b$$)... AIEEE 2009 A current loop$$ABCD$$is held fixed on the plane of the paper as shown in the figure. The arcs$$BC$$(radius$$= b$$)... AIEEE 2009 A horizontal overhead powerline is at height of$$4m$$from the ground and carries a current of$$100A$$from east to we... AIEEE 2008 Relative permittivity and permeability of a material$${\varepsilon _r}$$and$${\mu _r},$$respectively. Which of the f... AIEEE 2008 Two identical conducting wires$$AOB$$and$$COD$$are placed at right angles to each other. The wire$$AOB$$carries an... AIEEE 2007 A long straight wire of radius$$a$$carries a steady current$$i.$$The current is uniformly distributed across its cr... AIEEE 2007 A current$$I$$flows along the length of an infinitely long, straight, thin walled pipe. Then AIEEE 2007 A charged particle moves through a magnetic field perpendicular to its direction. Then AIEEE 2007 A charged particle with charge$$q$$enters a region of constant, uniform and mutually orthogonal fields$$\overrightarr...
AIEEE 2007
A long solenoid has $$200$$ turns per $$cm$$ and carries a current $$i.$$ The magnetic field at its center is $$6.28 \ti... AIEEE 2006 In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A... AIEEE 2006 Needles$${N_1}$$,$${N_2}$$and$${N_3}$$are made of ferromagnetic, a paramagnetic and a diamagnetic substance respect... AIEEE 2006 A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an ele... AIEEE 2005 Two concentric coils each of radius equal to$$2\pi cm$$are placed at right angles to each other.$$3$$ampe... AIEEE 2005 A magnetic needle is kept in a non-uniform magnetic field. It experiences AIEEE 2005 A charged particle of mass$$m$$and charge$$q$$travels on a circular path of radius$$r$$that is perpendicular to a ... AIEEE 2005 Two thin, long, parallel wires, separated by a distance$$'d'$$carry a current of$$'i'A$$in the same direction. ... AIEEE 2005 The materials suitable for making electromagnets should have AIEEE 2004 Two long conductors, separated by a distance$$d$$carry current$${I_1}$$and$${I_2}$$in the same direction. They exe... AIEEE 2004 The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration mag... AIEEE 2004 The magnetic field due to a current carrying circular loop of radius$$3cm$$at a point on the axis at a distance o... AIEEE 2004 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the c... AIEEE 2004 A current$$i$$ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any poin... AIEEE 2004 Curie temperature is the temperature above which AIEEE 2004 The magnetic lines of force inside a bar magnet AIEEE 2003 A magnetic needle lying parallel to a magnetic field requires$$W$$units of work to turn it through$${60^ \circ }.$$T... AIEEE 2003 A particle of charge$$ - 16 \times {10^{ - 18}}$$coulomb moving with velocity$$10m{s^{ - 1}}$$along the$$x$$-axis e... AIEEE 2003 A thin rectangular magnet suspended freely has a period of oscillation equal to$$T.$$Now it is broken into two equal h... AIEEE 2003 A particle of mass$$M$$and charge$$Q$$moving with velocity$$\overrightarrow v $$describe a circular path of radius... AIEEE 2003 Wires$$1$$and$$2$$carrying currents$$i{}_1$$and$$i{}_2$$respectively are inclined at an angle$$\theta $$to eac... AIEEE 2002 The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its AIEEE 2002 If in a circular coil$$A$$of radius$$R,$$current$$I$$is flowing and in another coil$$B$$of radius$$2R$$a curr... AIEEE 2002 If an electron and a proton having same momentum enter perpendicular to a magnetic field, then AIEEE 2002 Numerical More A wire of length$$314 \mathrm{~cm}$$carrying current of$$14 \mathrm{~A}$$is bent to form a circle. The magnetic mome... JEE Main 2022 (Online) 29th July Morning Shift A closely wounded circular coil of radius 5 cm produces a magnetic field of$$37.68 \times 10^{-4} \mathrm{~T}$$at its ... JEE Main 2022 (Online) 29th July Morning Shift A circular coil of 1000 turns each with area 1m2 is rotated about its vertical diameter at the rate of one revolution pe... JEE Main 2022 (Online) 24th June Evening Shift A metallic rod of length 20 cm is placed in North-South direction and is moved at a constant speed of 20 m/s towards Eas... JEE Main 2022 (Online) 27th June Evening Shift A deuteron and a proton moving with equal kinetic energy enter into a uniform magnetic field at right angle to the field... JEE Main 2022 (Online) 27th June Evening Shift A singly ionized magnesium atom (A = 24) ion is accelerated to kinetic energy 5 keV, and is projected perpendicularly in... JEE Main 2022 (Online) 28th June Morning Shift A long solenoid with 1000 turns/m has a core material with relative permeability 500 and volume 103 cm3. If the core mat... JEE Main 2021 (Online) 31st August Evening Shift A plane electromagnetic wave with frequency of 30 MHz travels in free space. At particular point in space and time, elec... JEE Main 2021 (Online) 27th August Evening Shift A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an e... JEE Main 2021 (Online) 27th August Morning Shift A coil in the shape of an equilateral triangle of side 10 cm lies in a vertical plane between the pole pieces of permane... JEE Main 2021 (Online) 26th August Evening Shift A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s$$...
JEE Main 2021 (Online) 26th August Evening Shift
Two short magnetic dipoles m1 and m2 each having magnetic moment of 1 Am2 are placed at point O and P respectively. The ...
JEE Main 2021 (Online) 26th August Morning Shift
The electric field in a plane electromagnetic wave is given by $$\overrightarrow E = 200\cos \left[ {\left( {{{0.5 \tim... JEE Main 2021 (Online) 26th August Morning Shift In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85$$\times$$10$$-$$2 A/m2 and moment of inert... JEE Main 2021 (Online) 27th July Morning Shift The value of aluminium susceptibility is 2.2$$\times$$10$$-$$5. The percentage increase in the magnetic field if space... JEE Main 2021 (Online) 25th July Morning Shift A circular conducting coil of radius 1 m is being heated by the change of magnetic field$$\overrightarrow B $$passing ... JEE Main 2021 (Online) 25th July Morning Shift A radiation is emitted by 1000W bulb and it generates an electric field and magnetic field at P, placed at a distance of... JEE Main 2021 (Online) 26th February Morning Shift An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum... JEE Main 2021 (Online) 24th February Evening Slot An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative ... JEE Main 2021 (Online) 24th February Morning Slot Two concentric circular coils, C1 and C2 are placed in the XY plane. C1 has 500 turns, and a radius of 1 cm. C2 has 200 ... JEE Main 2020 (Online) 5th September Morning Slot A galvanometer coil has 500 turns and each turn has an average area of 3$$ \times $$10–4 m2 . If a torque of 1.5 Nm is... JEE Main 2020 (Online) 3rd September Evening Slot A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0$$ \times  10–5 T with its plane perpendi...
JEE Main 2020 (Online) 2nd September Morning Slot

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