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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Diamagnetic material
Paramagnetic material
Ferro magnetic material
Bipolar

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will be zero
will depend on the radius of the circle
will be infinite
will depend on the amount of e.m.f. applied

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

24 AT
0.24 AT
240 AT
2.4 AT

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Magnetism and Electromagnetism
The magnetic materials exhibit the property of magnetisation because of

orbital motion of electrons
spin of electrons
either of these
spin of nucleus

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Magnetism and Electromagnetism
How does the magnetic compass needle behave in a magnetic field?

It assures a position right angle to magnetic field
It starts rotating
It assures a position which follows a line of magnetic flux
None of the listed here

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Magnetism and Electromagnetism
In the left hand rule, forefinger always represents

Voltage
direction of force on the conductor
current
magnetic field

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MORE MCQ ON Magnetism and Electromagnetism

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