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Magnetism and Electromagnetism

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?

300 AT
30 AT
0.3 AT
3 AT

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Magnetism and Electromagnetism
If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Increase
Is zero
None of the listed here
Decrease

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Magnetism and Electromagnetism
Which of the following is the unit of magnetic flux density?

Tesla
Weber
None of the listed here
Lumens

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Magnetism and Electromagnetism
The Biotsavart's law is a general modification of

Faraday's laws
Kirchhoff's law
Ampere's law
Lenz's law

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

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Magnetism and Electromagnetism
The bar magnet has

Dipole moment
Both dipole and monopole moment
Monopole moment
None of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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