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Electromagnetic induction

Electromagnetic induction
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

Unaffected
Quadrupled
Doubled
Halved

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

All of the listed here
Cross-sectional area of their common core
Permeability of the core
The number of their turns

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Electromagnetic induction
A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is

500 ohms
5000 ohms
1000 ohms
100 ohms

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Electromagnetic induction
Which circuit element(s) will oppose the change in circuit current?

Resistance only
Inductance and capacitance
Capacitance only
Inductance 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
36 mH
12 mH
18 mH

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

Yes
No

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