Name: Tangent Galvanometer: Theory and Construction
Uploaded: 2019-07-19
Duration: 4 min 47 s
Description: When you heard of a tangent galvanometer, what strikes your mind? Don't you think this is related to tangent? Watch this video to know the science behind it.

Question

How the magnetic susceptibility (x_m) of diamagnetic, paramagnetic and feromagnetic substances depends on temperature (T).

Accepted Answer

Dependence of diamagnetic substance on temperature: The magnetic susceptibility of a diamagnetic substance is independent of temperature. For diamagnetic substance $χ_{m} \propto T^{o}$ . This is shown graphically in figure.

Dependence of paramagnetic substance on temperature : The magnetic susceptibility of paramagnetic substance decreases with rise of temperature.According to curie the magnetic susceptibility of a paramagnetic substance is inversely proportional to absolute temperature,i.e,

$χ_{m} \propto \frac{1}{T}$ or $χ_{m} = \frac{C}{T}$ (Where, $C =$ Curie constant.)

The graph representing the variation of susceptibility of paramagnetic substance with temperature is shown in figure below.

Dependence of ferromagnetic substance on temperature: The magnetic susceptibility of ferromagnetic substance decreases with rise of temperature and above a certain temperature, called curie temperature a ferromagnetic substance changes to paramagnetic substance.After curie temperature, the magnetic susceptibility varies as $χ = \frac{C}{T - T_{c}}$ , where $T_{c}$ , is curie point and $C$ , is a constant. The graph representing variation of magnetic susceptibility of ferromagnetic substance with absolute temperature is shown in figure below.

How the magnetic susceptibility (x_m) of diamagnetic, paramagnetic and feromagnetic substances depends on temperature (T).

Important Questions on Matter and Magnetism

Learn and Prepare for any exam you want !

How the magnetic susceptibility (xm) of diamagnetic, paramagnetic and feromagnetic substances depends on temperature (T).

Important Questions on Matter and Magnetism

Learn and Prepare for any exam you want !

How the magnetic susceptibility (x_m) of diamagnetic, paramagnetic and feromagnetic substances depends on temperature (T).