Question

What are diamagnetics ? State their properties.

Answer 1

$\bold{ANSWER}$

✨$\bold{DIAMAGNETICS}$ are the substances which are feebly repelled by strong magnet, e.g. Au, Ag, Bi Zn, Hg NaCI, H20, etc.

$\bold{properties}$ : -
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✨These substances get feebly magnetised in a direction opposite to the magnetising field in which these are placed.

(i) When a rod of such a substance is suspended in a uniform magnetic field, it sets itself at right angle to the field.

(ii) Magnetic lines of force do not prefer to pass through these substances.

(iii) The permeability of these substances is less than one.

(iv) The magnetic susceptibility of these substances is negative

(v) These substances do not obey Curie's law, i.e, their magnetic properties are not effected due to increase in temperature.

$\bold{thanks}$

Answer 2

Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force. In contrast, paramagnetic and ferromagnetic materials are attracted by a magnetic field.