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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Ferrites are a sub-group of

Ferri-magnetic material
Non-magnetic materials
Paramagnetic material
Ferro magnetic material

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Magnetism and Electromagnetism
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

6 T
600 T
6,000 T
600 T

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Magnetism and Electromagnetism
The unit for reluctance is

At/Wb
Wb
At/m
tesla

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Magnetism and Electromagnetism
A keeper is used to

Restore lost flux
Provide a closed path for flux
Amplify flux
Change the direction of magnetic lines

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Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

triangular
rectangular
circular
None of the listed here

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Magnetism and Electromagnetism
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is

proportional to distance between the conductors
proportional to X
inversely proportional to I
proportional to 7

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MORE MCQ ON Magnetism and Electromagnetism

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