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Electromagnetic induction

Electromagnetic induction
Which of the following is not a unit of inductance?

Hennry
Coulomb/volt ampere
All of the listed here
Volt second per ampere

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Electromagnetic induction
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

Capacitance
Self-inductance
Mutual inductance
Series aiding inductance

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Electromagnetic induction
Which of the following inductor will have the least eddy current losses?

Powdered iron core
Air core
Iron core
Laminated iron core

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Electromagnetic induction
The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is

6 mH
36 mH
12 mH
18 mH

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Electromagnetic induction
A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be

6 mH
12 mH
48 mH
24 mH

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Electromagnetic induction
Which of the following is unit of inductance?

Ohm
Hennry
Weber/metre
Ampere turns

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