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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The relative permeability of materials is not constant.

Diamagnetic
Paramagnetic
None of the listed here
Ferromagnetic

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Magnetism and Electromagnetism
A magnetic field exists around

Aluminium
Copper
Iron
Moving Charges

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Diamagnetic material
Ferro magnetic material
Paramagnetic material
Bipolar

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

Zinc
Copper
Brass
Ebolite

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Magnetism and Electromagnetism
In the left hand rule, forefinger always represents

direction of force on the conductor
current
magnetic field
Voltage

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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?

200 At
100 At
300 At
150 At

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