Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 15

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The universal property of all substances is

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 16

The variation of the intensity of magnetisation $(I)$ with respect to the intensity of magnetising field $(H)$ in a diamagnetic substance is described by the graph

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 17

The magnetic susceptibility of a paramagnetic material at

- 73^{°} C

is

0.0075

and its value at

- 173 ° C

will be

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 18

Liquid oxygen remains suspended between the two pole faces of a magnet because it is

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 19

Domain formation is a necessary feature of,

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 20

Susceptibility of a magnetic substance is found to depend on temperature and the strength of the magnetising field. The material is a :-

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 21

The hysteresis curve is studied generally for

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>EXERCISE>Q 23

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material arc denoted by

μ_{d}, μ_{p}

and

μ_{f}

respectively, then

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 1

A paramagnetic sample shows net magnetisation of

18 A m^{- 1}

when placed in an external magnetic field of

0.9 T

at a temperature of

36 K .

When the same sample is placed in an external magnetic field of

0.3 T

at a temperature of

54 K,

the magnetisation will be