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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The main constituent of permalloy is

Chromium
Cobalt
Tungsten
Nickel

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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?

300 At
150 At
100 At
200 At

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Magnetism and Electromagnetism
The unit of relative permeability is

Its dimensionless
Hennry
Hennry/meter
None of the listed here

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Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Soft iron
Brass
Copper
Aluminium

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Magnetism and Electromagnetism
The most effective and quickest may of making a magnet from soft iron is by

Placing it inside a coil carrying current
The use of permanent magnet
Induction
Rubbing with another magnet

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Magnetism and Electromagnetism
Degaussing is the process of

Removal of magnetic impurities
Remagnetising metallic parts
Removing gases from the materials
Demagnetising metallic parts

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MORE MCQ ON Magnetism and Electromagnetism

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