A short bar magnet of magnetic moment `m= 0.32 J T^(-1)` is placed in a unifrom magnetic field of 0.15T. If the bar is free to rotate in the plane of the field, which orientation would corresponds to its (a) stable, and (b) unstable equilibrium ? What is the potential energy of the magnet in each case ?

A bar magnet of length 0.1 m and with a magnetic moment of 5Am^(2) is placed in a uniform a magnetic field of intensity 0.4T, with its axis making an angle of 60^(@) with the field. What is the torque on the magnet ?

A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the direction of a uniform magnetic field of 0.22 T. magnetic moment : (i) normal to the field direction, (ii) opposite to the field direction ?What is the torque on the magnet in cases (i) and (ii) ?

A short bar magnet has a magnetic moment of 0.48 JT^(-1) . Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on (a) the axis, (b) the equitorial lines (normal bisector) of the magnet.

A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the direction of a uniform magnetic field of 0.22 T. (a) What is the amount of worl required by an external torque to turn the magnet so as to align its magnetic moment : (i) normal to the field direction, (ii) opposite to the field direction ?

A short bar magnet of magnetic moment 5.25 xx 10^(-2) JT^(-1) is placed with its axis perpendicular to the earth's field direction. At what distance from the centre of the magnet, the resultant field is inclined at 45^(@) with earth's field on (a) Its normal bisector and (b) its axis. Magnitude of the earth's field at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distances involved.

1. A coil of area 2 cm^2 with turns 500 is placed in a magnetic field of 0.5 T with its plane parallel to field. The flux linked with the coil is

A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the direction of a uniform magnetic field of 0.22 T. (a) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction (ii) opposite to the field direction? (b) What is the torque on the magnet in cases (i) and (ii)?

A short bar magnet of magnetic moment 0,21 A - m^(2) is placed with its axis perpendicular to the direction of the horizontal component of the earth 's magnetic field .The distance of the point on the axis of the magnet from the centre of the magnet where the resultant magnetic field is inclined at 45^(@) with the horizontal component of the earth's field direction is (horizontal component of the earth's magnetic field 4.2xx10^(-5)