### Magnetism and Matter

goals
An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity $B$, the magnetic field $B_{s}$ inside the superconductor will be such that
The magnetic induction due to a magnetic pole of pole strength 1500 A-m at a distance of 50 cm is:
A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil, then

Maximum P.E. of magnet of moment M situated in a magnetic field of induction B, is

When a D.M. is set in $\tan A$ position, the deflection is $30^{o}$ for a magnet A placed at a distance of $40\ cm$ from the midpoint of the D.M. When the D.M. is kept in $\tan B$ position another magnet B produces a deflection of $60^{o}$, when placed at the same distance. The ratio of the magnetic moments of A and B is :