Self and Mutual Induction

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Self and Mutual Induction: Overview

This topic covers concepts, such as Induction, Self Induction, Coefficient of Self Inductance, The Factors on Which Coefficient of Self Inductance Will Depend, Method of Finding Coefficient of Self Inductance, Mutual Induction, etc.

Important Questions on Self and Mutual Induction

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Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductor is measured to be 2500 mH then Mutual inductor between the coils is ___________ mH.

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The SI unit of coefficient of mutual induction is

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The circuit arrangement given below shows that when A.C. passes through the coil A, the current starts flowing in coil B.

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Mention the underlying principle involved.

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What is the expression for the self-inductance of a long, air-cored solenoid of length l, radius r, and having N number of turns?

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When the current in an inductor is 1.0 A, the energy stored in the inductor is 3.0mJ. If the current is reduced to 0.5 A, the energy stored in the inductor would be

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An air-core solenoid has an inductance of 10 Henry. It is carrying a current of 100 Ampere. The amount of energy stored in the magnetic field that is created by the current is

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The energy stored in a 40 mH inductor when a current of 6 A passes through it is

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The current in a 25 mH inductor changes at a constant rate of 5 A s1. The voltage induced in the coil is

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Two coils of inductances L1 and L2 are linked such that their mutual inductance is M. Then

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A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4×10-3 Wb. The self-inductance of the solenoid is

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Two coils of inductances L1 and L2 are linked such that their mutual inductance is M. Then,

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When a current of 5 A flow in the primary coil then the flux linked with the secondary coil is 200 Weber. The value of coefficient of mutual induction will be

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The value of coefficient of mutual induction for the arrangement of two coils shown in the figure will be :

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Two circuits have mutual inductance of  0.09H . Average e.m.f. induced in the secondary circuit by a change of current from 0 to 20 A in  0.006s in primary circuit will be

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On what factors, mutual inductance between two coils depends.

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Write the energy density formula in the case of a magnetic field or inductor.

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The magnetic energy per unit volume is

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The physical quantity which is measured in the unit of Wb A-1 is

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In an electromagnetic wave, the average energy density associated with the magnetic field will be

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Current flowing through a solenoid having inductance 2 mH is 4 A. Find the energy stored in the solenoid.