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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

2.4 At
2,400 At
24 At
240 At

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

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Magnetism and Electromagnetism
Tesla is a unit of

Flux
Field strength
Inductance
Flux density

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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?

18.75 At
300 At
30 At
187 At

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Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

higher
lower
little
zero

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Magnetism and Electromagnetism
If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

increases
doubles
remains the same
decreases

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MORE MCQ ON Magnetism and Electromagnetism

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