How does the magnetic moment of a circular coil vary with its radius?

Determine the magnetic induction at the centre of a circular coil of radius r carrying a current I with the help of the Biot-Savart law.

How does the resistance of a semiconductor vary with temperature ?

On what physical quantity does the magnetic moment of an electron revolving in an orbit depend ?

Sketch a graph to show the variation of the magnetic field due to a circular current carrying coil with distance along its axis on both sides of its centre.

Define neutral point. How will you find the magnetic moment of a bar magnet by locating its neutral point, when magnet is placed with its north pole towards (a) north pole of the earth and (b) south pole of the earth?

How does the moment of inertia of a body change with temperature?

An electron (charge =-e ) is revolving around a nucleus along a circular path of radius r with frequency f . What will be the magnetic moment of the electron due to its orbital motion ?

A circular coil of N turns and diameter d carries a current I . It is unwound and rewound to make another coil of diameter 2d , current I remaining the same . Calculate the ratio of the magnetic moments of the new coil and the original coil .

A circular coil of 'N' turns and diameter 'd' carries a current 'I'. It is unwound and rewound to make another coil of diameter '2d' and current 'I' remaining the same. Calculate the ratio of the magnetic moments of the new coil and the original coil.