Magnetic Properties of Matter · Physics · JEE Main

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Numerical

JEE Main 2024 (Online) 8th April Evening Shift
The coercivity of a magnet is $$5 \times 10^3 \mathrm{~A} / \mathrm{m}$$. The amount of current required to be passed in a solenoid of length $$30 \ma...
JEE Main 2024 (Online) 30th January Morning Shift
The horizontal component of earth's magnetic field at a place is $$3.5 \times 10^{-5} \mathrm{~T}$$. A very long straight conductor carrying current o...
JEE Main 2024 (Online) 29th January Morning Shift
The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of $$20 \mathrm{~cm}$$ from its center is $$1.5 \times 1...
JEE Main 2023 (Online) 12th April Morning Shift
A compass needle oscillates 20 times per minute at a place where the dip is $$30^{\circ}$$ and 30 times per minute where the dip is $$60^{\circ}$$. Th...
JEE Main 2023 (Online) 10th April Morning Shift
The current required to be passed through a solenoid of 15 cm length and 60 turns in order of demagnetise a bar magnet of magnetic intensity $$2.4\tim...
JEE Main 2023 (Online) 8th April Morning Shift
The magnetic intensity at the center of a long current carrying solenoid is found to be $$1.6 \times 10^{3} \mathrm{Am}^{-1}$$. If the number of turns...
JEE Main 2021 (Online) 27th July Morning Shift
In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85 $$\times$$ 10$$-$$2 A/m2 and moment of inertia 5 $$\times$$ 10$$-$$6 kg m2...
JEE Main 2021 (Online) 25th July Morning Shift
The value of aluminium susceptibility is 2.2 $$\times$$ 10$$-$$5. The percentage increase in the magnetic field if space within a current carrying tor...

MCQ (Single Correct Answer)

JEE Main 2024 (Online) 8th April Morning Shift
Paramagnetic substances: A. align themselves along the directions of external magnetic field. B. attract strongly towards external magnetic field. C. ...
JEE Main 2024 (Online) 6th April Evening Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2024 (Online) 4th April Evening Shift
The magnetic moment of a bar magnet is $$0.5 \mathrm{~Am}^2$$. It is suspended in a uniform magnetic field of $$8 \times 10^{-2} \mathrm{~T}$$. The wo...
JEE Main 2023 (Online) 12th April Morning Shift
Given below are two statements: Statement I : The diamagnetic property depends on temperature. Statement II : The induced magnetic dipole moment in a ...
JEE Main 2023 (Online) 11th April Morning Shift
The free space inside a current carrying toroid is filled with a material of susceptibility $$2 \times 10^{-2}$$. The percentage increase in the value...
JEE Main 2023 (Online) 10th April Evening Shift
A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time the magnet will
JEE Main 2023 (Online) 10th April Evening Shift
Given below are two statements: Statement I : For diamagnetic substance, $$-1 \leq \chi Statement II : Diamagnetic substances when placed in an exter...
JEE Main 2023 (Online) 8th April Evening Shift
Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$ Assertion A : Electroma...
JEE Main 2023 (Online) 31st January Morning Shift
A bar magnet with a magnetic moment $$5.0 \mathrm{Am}^{2}$$ is placed in parallel position relative to a magnetic field of $$0.4 \mathrm{~T}$$. The am...
JEE Main 2023 (Online) 25th January Morning Shift
A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 m long and 0.2 m in diameter. The magnetic intensity at the center of ...
JEE Main 2022 (Online) 29th July Evening Shift
The vertical component of the earth's magnetic field is $$6 \times 10^{-5} \mathrm{~T}$$ at any place where the angle of dip is $$37^{\circ}$$. The ea...
JEE Main 2022 (Online) 27th July Evening Shift
A compass needle of oscillation magnetometer oscillates 20 times per minute at a place $$\mathrm{P}$$ of $$\operatorname{dip} 30^{\circ}$$. The number...
JEE Main 2022 (Online) 27th July Morning Shift
Two bar magnets oscillate in a horizontal plane in earth's magnetic field with time periods of $$3 \mathrm{~s}$$ and $$4 \mathrm{~s}$$ respectively. I...
JEE Main 2022 (Online) 27th July Morning Shift
A magnet hung at $$45^{\circ}$$ with magnetic meridian makes an angle of $$60^{\circ}$$ with the horizontal. The actual value of the angle of dip is -...
JEE Main 2022 (Online) 25th July Evening Shift
An electron with energy 0.1 keV moves at right angle to the earth's magnetic field of 1 $$\times$$ 10$$-$$4 Wbm$$-$$2. The frequency of revolution of ...
JEE Main 2022 (Online) 29th June Morning Shift
At a certain place the angle of dip is 30$$^\circ$$ and the horizontal component of earth's magnetic field is 0.5 G. The earth's total magnetic field ...
JEE Main 2022 (Online) 28th June Evening Shift
The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to 1.2 $$\times$$ 10$$-$...
JEE Main 2022 (Online) 27th June Morning Shift
The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m, is : [Permeability of free space $$\mu$$0 = 4$$\pi$$ ...
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 field of magnitude B = 14 $$...
JEE Main 2022 (Online) 25th June Evening Shift
Given below are two statements : Statement I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature. St...
JEE Main 2022 (Online) 24th June Evening Shift
The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has
JEE Main 2021 (Online) 1st September Evening Shift
Following plots show magnetization (M) vs magnetizing field (H) and magnetic susceptibility ($$\chi $$) vs temperature (T) graph :Which of the followi...
JEE Main 2021 (Online) 22th July Evening Shift
Choose the correct option
JEE Main 2021 (Online) 22th July Evening Shift
Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet.Statement II : At high temperatur...
JEE Main 2021 (Online) 20th July Evening Shift
At an angle of 30$$^\circ$$ to the magnetic meridian, the apparent dip is 45$$^\circ$$. Find the true dip :
JEE Main 2021 (Online) 20th July Evening Shift
The magnetic susceptibility of a material of a rod is 499. Permeability in vacuum is 4$$\pi$$ $$\times$$ 10$$-$$7 H/m. Absolute permeability of the ma...
JEE Main 2021 (Online) 18th March Evening Shift
Which of the following statements are correct?(A) Electric monopoles do not exist whereas magnetic monopoles exist.(B) Magnetic field lines due to a s...
JEE Main 2021 (Online) 16th March Morning Shift
A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A neutral point is obt...
JEE Main 2021 (Online) 25th February Evening Shift
In a ferromagnetic material, below the curie temperature, a domain is defined as :
JEE Main 2021 (Online) 24th February Evening Shift
A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains :
JEE Main 2020 (Online) 4th September Evening 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 temperature of 4 K. When the sa...
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 minimum work required to rotate ...
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. The whole system is placed i...
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 the following, which property b...
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 saturation, respectively, of t...
JEE Main 2019 (Online) 12th April Morning Slot
A magnetic compass needle oscillates 30 times per minute at a place where the dip is 45o, and 40 times per minute where the dip is 30o. If B1 and B2 a...
JEE Main 2019 (Online) 8th April Evening Slot
Two magnetic dipoles X and Y are placed at a separation d, with their axes perpendicular to each other. The dipole moment of Y is twice that of X. A p...
JEE Main 2019 (Online) 12th January Evening Slot
A paramagnetic material has 1028 atoms/m3. Its magnetic susceptibility at temperature 350 K is 2.8 $$ \times $$ 10–4. Its susceptibility at 300 K is :...
JEE Main 2019 (Online) 11th January Evening Slot
A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of 20 $$ \times $$ 10–6 J/ T when a magnetic intensity of ...
JEE Main 2019 (Online) 10th January Evening Slot
At some location on earth, the horizontal component of earth’s magnetic field is 18 × 10–6 T. At this location, magnetic needle of length 0.12 m and p...
JEE Main 2019 (Online) 10th January Morning Slot
A magnet of total magnetic moment 10-2 $${\widehat i}$$ A-m2 is placed in a time varying magnetic field, B$${\widehat i}$$ (cos $$\omega t$$) where B...
JEE Main 2019 (Online) 9th January Morning Slot
A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The corecivity of the bar ...
JEE Main 2018 (Online) 15th April Morning Slot
The $$B$$-$$H$$ curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solended with $$1000$$ turns/cm. The current t...
JEE Main 2017 (Offline)
A magnetic needle of magnetic moment 6.7 $$\times$$ 10-2 A m2 and moment of inertia 7.5 $$\times$$ 10-6 kg m2 is performing simple harmonic oscillatio...
JEE Main 2016 (Online) 10th April Morning Slot
A fighter plane of length 20 m, wing span (distance from tip of one wing to the tip of the other wing) of 15 m and height 5 m is flying towards east o...
JEE Main 2016 (Offline)
Hysteresis loops for two magnetic materials $$A$$ and $$B$$ are given below : These materials are used to make magnets for electric generators, tran...
JEE Main 2014 (Offline)
The coercivity of a small magnet where the ferromagnet gets demagnetized is $$3 \times {10^3}\,A{m^{ - 1}}.$$ The current required to be passed in a s...
JEE Main 2013 (Offline)
Two short bar magnets of length $$1$$ $$cm$$ each have magnetic moments $$1.20$$ $$A{m^2}$$ and $$1.00$$ $$A{m^2}$$ respectively. They are placed on ...
AIEEE 2008
Relative permittivity and permeability of a material $${\varepsilon _r}$$ and $${\mu _r},$$ respectively. Which of the following values of these quant...
AIEEE 2006
Needles $${N_1}$$, $${N_2}$$ and $${N_3}$$ are made of ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought c...
AIEEE 2005
A magnetic needle is kept in a non-uniform magnetic field. It experiences :
AIEEE 2004
Curie temperature is the temperature above which
AIEEE 2004
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is $$2s.$$ The magne...
AIEEE 2004
The materials suitable for making electromagnets should have
AIEEE 2003
A thin rectangular magnet suspended freely has a period of oscillation equal to $$T.$$ Now it is broken into two equal halves (each having half of the...
AIEEE 2003
A magnetic needle lying parallel to a magnetic field requires $$W$$ units of work to turn it through $${60^ \circ }.$$ The torque needed to maintain t...
AIEEE 2003
The magnetic lines of force inside a bar magnet
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