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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The main constituent of permalloy is

Chromium
Tungsten
Cobalt
Nickel

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Magnetism and Electromagnetism
The direction of a magnetic field within a magnet is

front to back
back to front
from south to north
from north to south

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Magnetism and Electromagnetism
Reciprocal of permeability is

Susceptibility
Permeability
Reluctivity
conductance

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT
0.3 AT
3 AT
30 AT

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Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

25 AT/m
2500 AT/m
0.25 AT/m
250 AT/m

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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

M/2
2M
M/4
M

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MORE MCQ ON Magnetism and Electromagnetism

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