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Magnetism and Electromagnetism

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

triangular
circular
None of the listed here
rectangular

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Magnetism and Electromagnetism
Temporary magnets are used in

Generators
Loud speakers
All of the listed here
Motors

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Magnetism and Electromagnetism
The relative permeability is less than unity is case of

Ferromagnetic material
Paramagnetic material
Diamagnetic material
Ferrits

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Magnetism and Electromagnetism
The main constituent of permalloy is

Chromium
Nickel
Cobalt
Tungsten

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

111 At/Wb
1 At/Wb
1111 At/Wb
11 At/Wb

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of force on a current carrying conductor in a magnetic field
Polarity of a magnetic pole
Direction of magnetic field due to current carrying conductor
Direction of flux in a solenoid

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MORE MCQ ON Magnetism and Electromagnetism

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