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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The unit of relative permeability is

Its dimensionless
Hennry/meter
Hennry
None of the listed here

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Flux density decreases
Flux density increases
Core length increases
Core area increases

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Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

None of the listed here
Zero
BLI2
BLI

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Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

Ferromagnetic
Diamagnetic
Dielectric
None of the listed here

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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?

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

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

Large area of B-H loop
High co-ercivity and low density
High permeability and low hysteresis loss
High co-ercivity and high retentivity

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MORE MCQ ON Magnetism and Electromagnetism

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