Magnetism

Magnetic length of a bar magnet is

The dimensional formula for Magnetic Moment of a magnet is

If a magnet is hanged with its magnetic axis then it stops in

Magnetic induction and magnetic flux differ in the dimensions of

Magnetic moment for a solenoid and corresponding bar magnet is

Assertion: Magnetic field strength at a point on axial line of a bar magnet is along South to North pole of magnet. Reason: The magnetic field strength can never be along North to South pole of magnet.

A: If a bar magnet is cut into two equal halves then magnetic dipole moment of each part is half that of the original magnet. R: magnetic dipole moment is the product of pole strength and magnetic length.

A bar magnet has a magnetic moment of 200 A m? The magnet is suspended in a magnetic field of 0.30 "N A"^(-1)" m"^(-1) . The torque required to rotate the magnet from its equilibrium position through an angle of 30^(@) , will be

A magnet is suspended in the magnetic meridian with an untwisted wire. The upper end of wire is rotated through 181° to deflect magnet by 37° from magnetic meridian. Now this magnet is replaced by another magnet and upper end of wire has to be rotated by 273° to deflect magnet by 53° from magnetic meridian. The ratio of magnetic moment of the two magnets respectively is

Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by