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When induced emf in inductor coil is 50% of its maximum value then stored energy in inductor coil in the given circuit at that instant will be :

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Important Questions on Electromagnetic Induction

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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 108
An inductor coil stores energy U when a current i is passed through it and dissipates heat energy at the rate of P. The time constant of the circuit when this coil is connected across a battery of zero internal resistance is :
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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 109
Two coils are at fixed locations. When coil 1 has no current and the current in coil 2 increases at the rate 15.0 A s-1 the e.m.f. in coil 1 in 25.0 mV, when coil 2 has no current and coil 1 has a current of 3.6 A, flux linkage in coil 2 is
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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 110
A rectangular loop of sides a and b is placed in xy plane. A very long wire is also placed in xy plane such that side of length a of the loop is parallel to the wire. The distance between the wire and the nearest edge of the loop is d. The mutual inductance of this system is proportional to
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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 111
Two coils of self inductance 100 mH and 400 mH are placed very close to each other. Find the maximum mutual inductance between the two when 4 A current passes through them
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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 112
A long straight wire is placed along the axis of a circular ring of radius R. The mutual inductance of this system is
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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 113

The frequency of oscillation of current in the inductor is:

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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 1>Q 115

A circuit containing capacitors C1 and C2 as shown in the figure are in steady state with key K1 closed. At the instant t=0, if K1  is opened and  K2 is closed then the maximum current in the circuit will be :

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Alpha Question Bank for Engineering: Physics>Chapter 27 - Electromagnetic Induction>Exercise - 2>Q 1
A coil of inductance 5.0 mH and negligible resistance is connected to an oscillator giving an output voltage, E=(10 V)sinωt. Which of the following is correct?