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Electromagnetic induction

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

0.5
2.0
2.5
1.0

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Electromagnetic induction
The law that the induced e.m.f. and current always oppose the cause producing them is due to

Newton
Lenz
Faraday
Coulomb

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

900 uH
600 uH
1200 uH
300 uH

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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

24 mH
28 mH
12 mH
3 mH

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Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Energy
Induced e.m.f.
Charge
Induced current

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

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

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MORE MCQ ON Electromagnetic induction

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