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Magnetism and Electromagnetism

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

Loud speakers
Transformers
Energy meters
None of the listed here

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

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Magnetism and Electromagnetism
The ability of a material to remain magnetized after removal of the magnetizing force is known as

reluctance
permeability
retentivity
hysteresis

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Magnetism and Electromagnetism
For a given wirewound core, an increase in current through the coil

increases the flux density
reverses the flux lines
causes no change in flux density
decreases the flux density

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Magnetism and Electromagnetism
Degaussing is the process of

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

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Magnetism and Electromagnetism
One telsa is equal to

1 Wb/m
1 Wb/m²
1 mWb/m²
1 Wb/mm²

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MORE MCQ ON Magnetism and Electromagnetism

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