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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The main constituent of permalloy is

Cobalt
Tungsten
Nickel
Chromium

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Magnetism and Electromagnetism
For a given wire-wound core, an increase in current through the coil

Decreases the flux density
Increases the flux density
Reverses the flux lines
Causes no change in flux density

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

From north pole to south pole
From south pole to north pole
None of the listed here
From one end of the magnet to another

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

Paramagnetic
None of the listed here
Diamagnetic
Ferromagnetic

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Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

equal to that ferromagnetic mate rials
slightly less than unity
slightly more than unity
equal to unity

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

antiferrimagnetic materials
diamagnetic materials
ferrimagnetic materials
antiferromagnetic materials

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MORE MCQ ON Magnetism and Electromagnetism

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