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Earn 100
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.
Important Questions on Electromagnetic Induction
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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.
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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.
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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.
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State and explain Faraday's laws of electromagnetic induction, with their experimental demonstration.
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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?
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Discuss the various methods of producing
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What are eddy current? Discuss briefly any two applications of eddy current. How are they minimised?
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Explain the phenomenon of mutual induction. Define coefficient of mutual induction. What are its units? Calculate coefficient of mutual inductance between two long solenoids?
