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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The main constituent of permalloy is

Chromium
Nickel
Tungsten
Cobalt

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Magnetism and Electromagnetism
A permeable substance is one

Which is a bad conductor
Which is a strong magnet
Through which the magnetic lines of force can pass very easily
Which is a good conductor

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Magnetism and Electromagnetism
A permeable substance is one

which is a strong magnet
through which the magnetic lines of force can pass very easily
which is a bad conductor
which is a good conductor

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Magnetism and Electromagnetism
What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?

22 x 10"8 N
22 x 10"5 N
22 x 10"7 N
22 x 10-6 N

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Magnetism and Electromagnetism
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

2M
M/2
M
M/4

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing the cross-sectional area
All of the listed here
Increasing current supply
Increasing the number of turns

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MORE MCQ ON Magnetism and Electromagnetism

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