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Magnetism and Electromagnetism

Magnetism and Electromagnetism
When a solenoid is activated, the force that moves the plunger is

varying voltage
an electromagnetic field
a permanent magnetic field
a steady current

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Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

higher
lower
little
zero

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Magnetism and Electromagnetism
The main constituent of permalloy is

Cobalt
Tungsten
Nickel
Chromium

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

100 At
200 At
150 At
300 At

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Magnetism and Electromagnetism
The force between two long parallel conductors is inversely proportional to

Distance between the conductors
Radius of conductor
Product of current in two conductors
Current in one conductor

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Magnetism and Electromagnetism
Ferrites are materials.

Paramagnetic
None of the listed here
Ferromagnetic
Diamagnetic

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MORE MCQ ON Magnetism and Electromagnetism

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