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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

Diamagnetic
Ferromagnetic
None of the listed here
Dielectric

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Magnetism and Electromagnetism
Which of the following materials are diamagnetic?

Silver
Iron
Copper
Silver and copper

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Magnetism and Electromagnetism
Degaussing is the process of

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

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

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Magnetism and Electromagnetism
If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage

reverses polarity
remains unchanged
decreases
increases

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Magnetism and Electromagnetism
The unit of relative permeability is

None of the listed here
Hennry
Its dimensionless
Hennry/meter

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