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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Magnetic moment is a

pole strength
scalar quantity
universal constant
vector quantity

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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 ?

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

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

30 AT
300 AT
3 AT
0.3 AT

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing current supply
Increasing the number of turns
Increasing the cross-sectional area
All of the listed here

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Magnetism and Electromagnetism
Tesla is a unit of

Flux
Inductance
Field strength
Flux density

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

360
180
90
270

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MORE MCQ ON Magnetism and Electromagnetism

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