MEDIUM
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IMPORTANT
Earn 100
An electron moves in a circle with uniform speed in a stationary magnetic field normal to the plane of magnetic field. If the field magnitude is made to increase with time, will it continue to revolve in the same circle?
Important Questions on Electromagnetic Induction
HARD
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IMPORTANT
A wheel with a certain number of spokes is rotated in a plane normal to earth's magnetic field, so that an emf is induced between the axle and rim of the wheel. Keeping all other things same, number of spokes is changed. How is the emf affected?
HARD
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A solenoid coil has turns per along its length and a cross-sectional area of Now turns of another wire are wound round the first solenoid coaxially, the two coils are electrically insulated from each other. Calculate the mutual inductance between the two coils.
HARD
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IMPORTANT
A toroidal solenoid with an air core has an average radius of area of cross section and 1200 turns. Obtain the self inductance of the toroid. Ignore field variation across the cross section of the toroid.
HARD
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A secondary coil of turns is wound closely on the toroid above. If the current in the primary coil is increased from zero to in obtain the induced emf in the second coil.
MEDIUM
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IMPORTANT
Define self inductance. Write the SI unit. Find an expression for the self inductance of a coil. Give two factors on which self inductance of an air-cored coil depends.
MEDIUM
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IMPORTANT
State and explain Faraday's laws of electromagnetic induction, with their experimental demonstration.
MEDIUM
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State and explain Lenz's law. How will you verify it experimentally? Does it obey the principle of conservation of energy?
MEDIUM
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IMPORTANT
Discuss the various methods of producing
