MEDIUM
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IMPORTANT
Earn 100

A coil is removed from a magnetic field slowly. In which case more work is done?

Important Questions on Electromagnetic Induction

EASY
NEET
IMPORTANT
As the speed of bicycle is increased, the illumination of its lamp increases. Why?
HARD
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IMPORTANT
A conducting loop is held stationary normal to the field between the pole-pieces of a fixed permanent magnet. Can we produce current in the loop by choosing a very strong magnet?
MEDIUM
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IMPORTANT
Can one have an inductance without a resistance? How about a resistance with an inductance?
MEDIUM
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IMPORTANT
A coil is wound on an iron core and looped back on itself so that the core has two sets of closely wound wires in series carrying currents in opposite senses. How is its self inductance affected?
MEDIUM
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IMPORTANT
Explain why resistance coils are usually double wound.
MEDIUM
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IMPORTANT
A glass rod of length L moves with velocity v in a uniform magnetic field B. What is the emf induced in the rod?
MEDIUM
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IMPORTANT
Are eddy currents useful or harmful?
EASY
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IMPORTANT
A train is moving with uniform velocity from north to south. Will any induced emf appear across ends of the axle.