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Electromagnetic induction

Electromagnetic induction
The direction of induced e.m.f. can be found by

Fleming's right hand rule
Lenz's law
Kirchhoff s voltage law
Laplace's law

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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
In case of an inductance, current is proportional to

None of the listed here
Magnetic field
Both of the listed here
Voltage across the inductance

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Electromagnetic induction
As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

Lies perpendicular to the magnetic flux
Moves parallel to the direction of the magnetic field
Cuts magnetic flux
Lies in a magnetic field

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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
0.5
2.0

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Electromagnetic induction
Which of the following inductor will have the least eddy current losses?

Powdered iron core
Air core
Laminated iron core
Iron core

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MORE MCQ ON Electromagnetic induction

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