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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

residual magnetism
permeance
reluctance
susceptance

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Magnetism and Electromagnetism
Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

0.1 N
10 N
0.01 N
100 N

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

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Magnetism and Electromagnetism
There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

90,000 At/Wb
9,000 At/Wb
14,400 At/Wb
1,440 At/Wb

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

All of the listed here
By inductive action of another magnet
Heating
Hammering

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Magnetism and Electromagnetism
Unit for quantity of electricity is

Ampere
Ampere-hour
Coulomb
Joule

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MORE MCQ ON Magnetism and Electromagnetism

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