Magnetism · Physics · WB JEE

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Subjective

WB JEE 2008
What should be the resistance of an ideal ammeter and an ideal voltmeter?

MCQ (Single Correct Answer)

WB JEE 2023
A wire carrying a steady current I is kept in the x-y plane along the curve $$y=A \sin \left(\frac{2 \pi}{\lambda} x\right)$$. A magnetic field B exi...
WB JEE 2023
A bar magnet falls from rest under gravity through the centre of a horizontal ring of conducting wire as shown in figure. Which of the following grap...
WB JEE 2022
Two infinite line-charges parallel to each other are moving with a constant velocity v in the same direction as shown in the figure. The separation b...
WB JEE 2022
An electron revolves around the nucleus in a circular path with angular momentum $$\overrightarrow L $$. A uniform magnetic field $$\overrightarrow B ...
WB JEE 2022
A straight wire is placed in a magnetic field that varies with distance x from origin as $$\overrightarrow B = {B_0}\left( {2 - {x \over a}} \right)\...
WB JEE 2022
A horizontal semi-circular wire of radius r is connected to a battery through two similar springs X and Y to an electric cell, which sends current I t...
WB JEE 2021
Consider two infinitely long wires parallel to Z-axis carrying same current I in the positive z-direction. One wire passes through the point L at coor...
WB JEE 2021
A thin charged rod is bent into the shape of a small circle of radius R, the charge per unit length of the rod being $$\lambda$$. The circle is rotate...
WB JEE 2021
For two types of magnetic materials A and B, variation of $$1\over\chi$$ ($$\chi$$ : susceptibility) versus temperature T is shown in the figure. Then...
WB JEE 2020
As shown in the figure, a single conducting wire is bent to form a loop in the form of a circle of radius r concentrically inside a square of side a, ...
WB JEE 2020
As shown in the figure, a wire is bent to form a D-shaped closed loop, carrying current I, where the curved part is a semi-circle of radius R. The loo...
WB JEE 2019
To which of the following quantities, the radius of the circular path of a charged particle moving at right angles to a uniform magnetic field is dire...
WB JEE 2019
An electric current 'I' enters and leaves a uniform circular wire of radius r through diametrically opposite points. A particle carrying a charge q mo...
WB JEE 2019
A current 'I' is flowing along an infinite, straight wire, in the positive Z-direction and the same current is flowing along a similar parallel wire 5...
WB JEE 2019
A square conducting loop is placed near an infinitely long current carrying wire with one edge parallel to the wire as shown in the figure. If the cur...
WB JEE 2019
A particle with charge q moves with a velocity v in a direction perpendicular to the directions of uniform electric and magnetic fields, E and B respe...
WB JEE 2018
A proton of mass m moving with a speed v (< < c, velocity of light in vacuum) completes a circular orbit in time T in a uniform magnetic field. ...
WB JEE 2018
A uniform current is flowing along the length of an infinite, straight, thin, hollow cylinder of radius R. The magnetic field B produced at a perpendi...
WB JEE 2018
A circular loop of radius r of conducting wire connected with a voltage source of zero internal resistance produces a magnetic field B at its centre. ...
WB JEE 2018
A light charged particle is revolving in a circle of radius r in electrostatic attraction of a static heavy particle with opposite charge. How does th...
WB JEE 2017
The magnetic field due to a current in a straight wire segment of length L at a point on its perpendicular bisector at a distance r(r >> L)
WB JEE 2017
The magnets of two suspended coil galvanometers are of the same strength so that they produce identical uniform magnetic fields in the region of the c...
WB JEE 2017
A proton is moving with a uniform velocity of $${{{10}^6}}$$ ms$$-$$1 along the Y-axis, under the joint action of a magnetic field along Z-axis and an...
WB JEE 2017
A particle with charge e and mass m, moving along the X-axis with a uniform speed u, enters a region where a uniform electric field E is acting along ...

MCQ (More than One Correct Answer)

WB JEE 2022
As shown in figure, a rectangular loop of length 'a' and width 'b' and made of a conducting material of uniform cross-section is kept in a horizontal...
WB JEE 2021
A small bar magnet of dipole moment M is moving with speed v along x-direction towards a small closed circular conducting loop of radius a with its ce...
WB JEE 2020
A charged particle moves with constant velocity in a region, where no effect of gravity is felt but an electrostatic field E together with a magnetic ...
WB JEE 2019
A metallic loop is placed in a uniform magnetic field B with the plane of the loop perpendicular to B. Under which condition(s) given an emf will be i...
WB JEE 2017
Two long parallel wires separated by 0.1 m carry currents of 1A and 2A, respectively in opposite directions. A third current-carrying wire parallel to...
WB JEE 2017
If $$\chi $$ stands for the magnetic susceptibility of a substance, $$\mu$$ for its magnetic permeability and $$\mu$$0 for the permeability of free sp...
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