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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

31.25 V
3,125 V
1,000 V
2,000 V

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

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Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Copper
Zinc
Ebolite
Brass

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Magnetism and Electromagnetism
What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?

22 x 10"7 N
22 x 10-6 N
22 x 10"8 N
22 x 10"5 N

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

Stainless steel
Soft iron
None of the listed here
Hardened steel

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Magnetism and Electromagnetism
A material which is slightly repelled by a magnetic field is known as

conducting material
diamagnetic material
paramagnetic material
ferromagnetic material

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