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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Temporary magnets are used in

All of the listed here
Loud speakers
Motors
Generators

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Magnetism and Electromagnetism
For which of the following materials the saturation value is the highest?

Ferrites
Diamagnetic materials
Ferromagnetic materials
Paramagnetic materials

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

ferrimagnetic materials
diamagnetic materials
antiferrimagnetic materials
antiferromagnetic materials

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

susceptance
residual magnetism
permeance
reluctance

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Magnetism and Electromagnetism
A permeable substance is one

which is a bad conductor
through which the magnetic lines of force can pass very easily
which is a strong magnet
which is a good conductor

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

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

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MORE MCQ ON Magnetism and Electromagnetism

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