torque on bar magnet

The torque on a bar magnet due to the earth's magnetic field is maximum when the axis of the magnet is

Bar magnets

A bar magnet is placed in a uniform magnetic field with its magnetic moment making an angle theta with the field. Write expressions for torque on the bar magnet and potential energy of magnet in this orientation. When it this energy minimum?

Bar Magnets

Derive an expression for torque acting on a bar magnet held at an angle with the direction of a uniform magnetic field.

Assertion (A): The magnetic field configuration with 3 poles is not possible. Reason (R): No torque acts on a bar magnet itself due to its own field.

Calculate the magnitude of torque required to hold a bar magnet of magnetic moment 200Am^2 along a direction making an angle of 30^@ with the direction of uniform magnetic field of 0*36G .

Calculate torque acting on a bar magnet of length 20 cm magnetic dipole moment 4 xx 10^(-6) Am^(2) , which is placed in earth's magnetic field of flux density 2 xx 10^(-5) T , perpendicular to the field .