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State and Explain Faraday's laws of electromagnetic induction.()
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State Lenz' Law and show that it is in accordance with the law of conservation of energy.
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Use Lenz' law to find the direction of induced emf in a coil when (a) a north pole is brought towards the coil (b) north pole taken away from the coil (c) A south pole is brought towards the coil and (d) a south pole is taken away from the coil, Draw illustrations in each case.
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What is motional emf. Deduce an expression for it. State Fleming's right hand rule to find the direction of induced emf.
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What are eddy currents? Describe the applications of eddy currents.
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Explain the working of (a) Electromagnetic Brakes (b) Induction Furnace
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Which physical quantity is called the INERTIA OF ELECTRICITY? Why is its called so?
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Define self induction and self inductance. What is its unit? Write its dimensions.
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Derive an expression for the self inductance of a long solenoid.
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Explain the phenomenon of mutual induction and define mutual inductance. Write the unit and dimensions of mutual inductance.
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What are the factors affecting mutual inductance of a pair of coils? Define coefficient of coupling.
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Describe the various methods of producing induced emf. Derive an expression for the instantaneous emf induced in a coil rotated in a magnetic field.
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What is displacement current? Explain its need.