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Electromagnetic induction

Electromagnetic induction
Two 300 uH coils in series without mutual coupling have a total inductance of

600 uH
1200 uH
900 uH
300 uH

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Electromagnetic induction
An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is

0.02 wb
20 wb
0.2 wb
2 wb

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Electromagnetic induction
The coefficient of coupling between two air core coils depends on

None of the listed here
Self-inductance of two coils only
Mutual inductance and self inductance of two coils
Mutual inductance between two coils only

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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
12 mH
18 mH
36 mH

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Electromagnetic induction
Higher the self-inductance of a coil,

Lesser its weber-turns
Greater the flux produced by it
Lower the e.m.f. induced
Longer the delay in establishing steady current through it

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Electromagnetic induction
Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

9 H
6 H
10 H
12 H

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