Welcome to the Science Quiz 87

This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?

120

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

Ferrimagnetic materials

Antiferromagnetic materials

Diamagnetic materials

none

Correct! Wrong!

In a simple magnetic field the strength of magnet flux

decreases continuously from initial value to final value

is constant and has same value in energy part of the magnetic field

first increases and then decreases till it becomes zero

increases continuously from initial value to final value

Correct! Wrong!

The magnetic reluctance of a material

decreases with increasing cross sectional area of material

increases with increasing cross-sec-tional area of material

does not vary with increasing cross-sectional area of material

any of the above

Correct! Wrong!

The stray line of magnetic flux is defined as

a line of magnetic flux in a non-uniform field

a line vertical to the flux lines

a line of magnetic flux which does not follow the designed path

the mean length of a ring shaped coil

Correct! Wrong!

Paramagnetic materials have relative permeability

equal to that ferromagnetic materials

equal to unity

slightly less than unity

slightly more than unity

Correct! Wrong!

A permanent magnet

attracts only ferromagnetic substances

attracts all paramagnetic substances and repels others

attracts some substances and repels others

none

Correct! Wrong!

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

triangular

circular

both (a) & (b)

rectangular

Correct! Wrong!

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

Bipolar

Diamagnetic

Ferromagnetic

Paramagnetic

Correct! Wrong!

Science Quiz 87

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Welcome to the Science Quiz 87

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

In a simple magnetic field the strength of magnet flux

The magnetic reluctance of a material

The stray line of magnetic flux is defined as

Paramagnetic materials have relative permeability

A permanent magnet

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

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

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