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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The main constituent of permalloy is

Tungsten
Nickel
Chromium
Cobalt

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Magnetism and Electromagnetism
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m?

4 AT
10 AT
8 AT
16 AT

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Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

240 At
2.4 At
24 At
2,400 At

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Magnetism and Electromagnetism
For which of the following materials the saturation value is the highest?

Paramagnetic materials
Diamagnetic materials
Ferromagnetic materials
Ferrites

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

Ferromagnetic
None of the listed here
Dielectric
Diamagnetic

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Magnetism and Electromagnetism
Core of an electromagnet should have

Low coercivity
None of the listed here
Both low coercivity and high susceptibility
High susceptibility

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MORE MCQ ON Magnetism and Electromagnetism

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