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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The relative permeability of materials is not constant.

Paramagnetic
Diamagnetic
Ferromagnetic
None of the listed here

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Magnetism and Electromagnetism
Which of the following is a vector quantity?

Flux density
Magnetic potential
Relalative permeability
Magnetic field intensity

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

31.25 V
2,000 V
3,125 V
1,000 V

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Magnetism and Electromagnetism
The unit for reluctance is

tesla
At/m
At/Wb
Wb

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

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

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Magnetism and Electromagnetism
The materials having low retentivity are suitable for making

Weak magnet
Temporary Magnet
None of the listed here
Permanent magnet

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MORE MCQ ON Magnetism and Electromagnetism

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