Self-Induction and Mutual Induction

IMPORTANT

Self-Induction and Mutual Induction: Overview

This topic covers concepts, such as, Induction, Self Induction, Back EMF & Coefficient of Mutual Inductance etc.

Important Questions on Self-Induction and Mutual Induction

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The SI unit of coefficient of mutual induction is

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The S.I. unit of self-inductance of a coil 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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Two coils are fixed in space at some distance from each other such that there is a flux linkage between them. When coil 1 has no current and the current in the coil 2 increases at the rate 15.0 A s-1, the emf in the coil 1 is 25.0 mV. When coil 2 has a current of 3.6 A, the flux linkage in coil 2 (in mWb) is 

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If 0.1 J of energy is stored for the flow of current of 0.2 A in an inductor, then its inductance value is

HARD
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Two coils are fixed in space at some distance from each other such that there is a flux linkage between them. When coil 1 has no current and the current in the coil 2 increases at the rate 15.0 A s-1, the emf in the coil 1 is 25.0 mV. When coil 2 has a current of 3.6 A, the flux linkage in coil 2 (in mWb) is 

EASY
IMPORTANT

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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If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will

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What is self inductance of a coil which produces 5 V, when current in it changes from 3 A to 2 A in one millisecond?

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An inductance L and a resistance R are connected in series with a battery of emf E. If the maximum rate (in J/sec) at which the energy is stored in the magnetic field is1x then find x.  [Take E=0.2 V and R=1Ω].

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In the figure magnetic energyin J stored in the coil is:

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A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V=3t volt. (where t is in second). If the voltage is applied when t=0, then the energy stored in the coil after 4 s is,

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A 50 mH coil carries a current of 2 A, the energy stored in J is

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Radii of two conducting circular loops are b and a respectively, where ba. Centres of both loops coincide but planes of both loops are perpendicular to each other. The value of mutual inductance for these loops

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What will be the self-inductance of a coil of 100 turns if a current 5 A produces a magnetic flux 5×10-5 Wb?

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The phenomenon due to which there is an induced current in one coil due to the current in a neighbouring coil is:

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The self-inductance of a long solenoid carrying current is independent of:

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The SI unit of inductance, the Henry, can be written as :-
(i) Weberampere
(ii) Volt secondAmpere
(iii) Joule( Ampere )2
(iv) ohm-second

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Consider two solenoids A and B such that LA=2 LB and AA=12AB, where LA, AA and LB, AB are the length and area of the two solenoids respectively. If the magnetic energy stored in the both solenoids is same. What should be the ratio of their magnetic fields BABB=