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MAGNETISM AND ELECTROMAGNETISM

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

Magnetic field intensity
Flux density
Magnetic potential
Relalative permeability

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

All of the listed here
By inductive action of another magnet
Hammering
Heating

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 At
200 At
150 At
100 At

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

All of the listed here
Maxwell
Weber
Tesla

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

None of the listed here
Weak magnet
Permanent magnet
Temporary Magnet

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