### Magnetism and Matter

goals
By removing the inducing magnet, the induced magnetism is
Which power supply can be used in electric bell
The magnetic susceptibility for a diamagnetic substance decreases with the increase in temperature.

Two short bar magnets with magnetic moments $8$ $Am^2$ and $27$ $Am^2$ are placed $35$ $cm$ apart along their common axial line with their like poles facing each other. The neutral point is :

Two magnets when placed in $\tan A$ position at the same distance cause deflections of $30^{o}$ and $60^{o}$. The ratio of their magnetic moments is :