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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The use of permanent magnets is. not made in

Transformers
Loud speakers
None of the listed here
Energy meters

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Weber
Maxwell
All of the listed here
Tesla

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Hardened steel
None of the listed here
Soft iron
Stainless steel

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Magnetism and Electromagnetism
The magnetic materials exhibit the property of magnetisation because of

spin of nucleus
orbital motion of electrons
spin of electrons
either of these

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Magnetism and Electromagnetism
A permeable substance is one

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

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will depend on the radius of the circle
will depend on the amount of e.m.f. applied
will be infinite
will be zero

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