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Magnetism and Electromagnetism

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

None of the listed here
Weber
Lumens
Tesla

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

susceptance
residual magnetism
permeance
reluctance

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it has low permeability
it corrodes easily
it has high permeability
it has high specific gravity

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

11 At/Wb
1111 At/Wb
1 At/Wb
111 At/Wb

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Magnetism and Electromagnetism
When a solenoid is activated, the force that moves the plunger is

a steady current
a permanent magnetic field
varying voltage
an electromagnetic field

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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

None of the listed here
Decrease
Increase
Is zero

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MORE MCQ ON Magnetism and Electromagnetism

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