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Electromagnetic induction

Electromagnetic induction
Which of the following is unit of inductance?

Hennry
Ohm
Weber/metre
Ampere turns

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

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

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Electromagnetic induction
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

Mutual inductance
Series aiding inductance
Self-inductance
Capacitance

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

900 uH
1200 uH
300 uH
600 uH

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

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

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

Iron core
Laminated iron core
Powdered iron core
Air core

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MORE MCQ ON Electromagnetic induction

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