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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Zinc
Ebolite
Copper
Brass

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

2.4 AT
0.24 AT
240 AT
24 AT

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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

0.01 N
10 N
100 N
0.1 N

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

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

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Magnetism and Electromagnetism
Reciprocal of permeability is

Susceptibility
Permeability
Reluctivity
conductance

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

270
180
360
90

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MORE MCQ ON Magnetism and Electromagnetism

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