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Electromagnetic induction

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

No
Yes

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

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

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Electromagnetic induction
Increasing the field or increasing the current will decrease the force on the conductor.

Yes
No

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Electromagnetic induction
The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

12 mH
3 mH
48 mH
24 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

24 mH
12 mH
48 mH
6 mH

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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

20 H
5 H
15 H
10 H

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