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Electromagnetic induction

Electromagnetic induction
Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

30 mH
48 mH
36 mH
38 mH

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

600 uH
300 uH
1200 uH
900 uH

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Electromagnetic induction
The polarity of the induced voltage can be determined by using the left-hand generator rule.

Yes
No

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Electromagnetic induction
In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

1.0
2.5
2.0
0.5

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Electromagnetic induction
A moving magnetic field will produce the same effect as a conductor that is moving.

False
True

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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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