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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

0.24 N
240 N
2.4 N
24 N

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Magnetism and Electromagnetism
A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?

6338 N/Wb
63380 N/Wb
63.38 N/Wb
633.8 N/Wb

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

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Magnetism and Electromagnetism
Unit for quantity of electricity is

Joule
Ampere-hour
Ampere
Coulomb

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Magnetism and Electromagnetism
Degaussing is the process of

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

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MORE MCQ ON Magnetism and Electromagnetism

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