Units of pole strength of a magnet are -

A current of 3 A is flowing in a plane circular coil of radius 4 cm and number of turns 20. The coil is placed in a uniform magnetic field of magnetic induction 0.5 T. Then the dipole moment of the coil is -

A current carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon -

A bar magnet is cut into two equal halved by a plane parallel to the magnetic axis. Of the following physical quantities the one which remains unchanged is -

The points A and B are situated perpendicular to the axis of 2 cm long bar magnet at large distances x and 3 x from the centre on opposite sides. The ratio of magnetic fields at A and B will be approximately equal to -

A compass needle is placed at the magnetic pole it -

In the above question, torque acting on magnet is -

Two isolated point poles of strength 30 A-m and 60 A-m are placed at a distance of 0.3 m. The force of repulsion is -

Magnetic lines of force are -