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Magnetism and Electromagnetism

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

187 At
30 At
18.75 At
300 At

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Magnetism and Electromagnetism
Gilbert is a unit of

permittivity
magnetomotive force
electromotive force
conductance

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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 ?

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

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Magnetism and Electromagnetism
One telsa is equal to

1 mWb/m²
1 Wb/m²
1 Wb/m
1 Wb/mm²

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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

240 N
2.4 N
0.24 N
24 N

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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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