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Electromagnetic induction

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

True
False

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Electromagnetic induction
A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

0.1 s
0.5 s
0.2 s
None of the listed here

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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

36 mH
48 mH
30 mH
38 mH

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Electromagnetic induction
Reversing the field or the current will reverse the force on the conductor.

No
Yes

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Electromagnetic induction
A crack in the magnetic path of an inductor will result in

Unchanged inductance
Reduced inductance
Increased inductance
Zero inductance

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Electromagnetic induction
Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

15 H
5 H
10 H
20 H

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