MAGNETISM AND ELECTROMAGNETISM QUIZ

Unit for quantity of electricity is

Ampere

Coulomb

Ampere-hour

Joule

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The ratio of intensity of magnetisation to the magnetisation force is known as

None of the listed here

Flux density

Relatice permeability

Susceptibility

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The attraction capacity of electromagnet will increase if the

Flux density decreases

Core area increases

Flux density increases

Core length increases

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When an iron piece is placed in a magnetic field

the magnetic field will not be affected

the magnetic lines of force will bend away from their usual paths in order to go away from the piece

the iron piece will break

the magnetic lines of force will bend away from their usual paths in order to pass through the piece

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The susceptibility of paramagnetic materials generally lies between

10"2 and KT5

1CT3 and 1CT7

KT4 and KT8

KT3 and 1CT6

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Which of the following is not a unit of flux?

Maxwell

All of the listed here

Tesla

Weber

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Magnetism of a magnet can be destroyed by

All of the listed here

Hammering

Heating

By inductive action of another magnet

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The initial permeability of an iron rod is

The lowest permeability of the iron rod

The permeability almost in non-magnetised state

The permeability at the end of the iron rod

The highest permeability of the iron rod

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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

2,000 V

1,000 V

3,125 V

31.25 V

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Substances which have permeability less than the permeability of free space are known as

Diamagnetic material

Bipolar

Ferro magnetic material

Paramagnetic material

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