MEDIUM
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IMPORTANT
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A ring carrying current I lies in x-z plane as shown. A short magnetic dipole with dipole moment directed along x-axis is fixed at origin. If the ring is free to move anywhere, then it will

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Important Questions on Moving Charges and Magnetism

MEDIUM
JEE Main/Advance
IMPORTANT
Two galvanometers A and B require 3 mA and 5 mA respectively to produce the same deflection of 10 division then
EASY
JEE Main/Advance
IMPORTANT
Sensitivity of a moving coil galvanometer can be increased by:
HARD
JEE Main/Advance
IMPORTANT
The restoring couple in the moving coil galvanometer is due to
EASY
JEE Main/Advance
IMPORTANT
In an attempt to increases the current sensitivity of a moving coil galvanometer, it is found that its resistance becomes double while the current sensitivity increases by 10%. The voltage sensitivity of the galvanometer changes by
EASY
JEE Main/Advance
IMPORTANT

Value of r for which magnetic field at point P on the axis of a circular current carrying loop of radius a is maximum as shown in figure ______

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EASY
JEE Main/Advance
IMPORTANT
A particle of mass m and charge q moving with velocity v along the positive x-direction. It enters a region of uniform magnetic field B directed along the negative z-axis, extending from x=a to x=b. If minimum value of v required so that the particle may enter the region of x>b is 2q(b-a)BNm, then value of N is
EASY
JEE Main/Advance
IMPORTANT
Two current carrying loops of radius R and 2 R carrying current I and 2 I respectively are placed concentrically with their planes at right angle. If magnitude of resultant magnetic field at the centre is μ0I2RN, then value of N is _____.
MEDIUM
JEE Main/Advance
IMPORTANT

Magnetic field at O of a loop of uniform resistance per unit length is ______

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