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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

100 N
0.01 N
10 N
0.1 N

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Magnetism and Electromagnetism
The main constituent of permalloy is

Chromium
Tungsten
Nickel
Cobalt

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

None of the listed here
From south pole to north pole
From north pole to south pole
From one end of the magnet to another

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Magnetism and Electromagnetism
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

917 T
91 T
91.7 T
9.7 T

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Magnetism and Electromagnetism
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

30 At
300 At
18.75 At
187 At

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

Loud speakers
None of the listed here
Energy meters
Transformers

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MORE MCQ ON Magnetism and Electromagnetism

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