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Magnetism and Electromagnetism

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

reluctance
susceptance
permeance
residual magnetism

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

2,400 At
240 At
24 At
2.4 At

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Magnetism and Electromagnetism
Susceptibility is positive for

diamagnetic substances
ferromagnetic substances
None of these
non-magnetic substances

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

antiferrimagnetic materials
antiferromagnetic materials
ferrimagnetic materials
diamagnetic materials

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Magnetism and Electromagnetism
When the current through the coil of an electromagnet reverses, the

direction of the magnetic field remains unchanged
direction of the magnetic field reverses
magnetic field collapses
magnetic field expands

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Magnetism and Electromagnetism
For which of the following materials the saturation value is the highest?

Ferrites
Diamagnetic materials
Paramagnetic materials
Ferromagnetic materials

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MORE MCQ ON Magnetism and Electromagnetism

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