Torque on a Magnetic Dipole (Bar Magnet) in a Uniform Magnetic Field

A magnetic dipole is under the influence of two magnetic fields The angle between the field directions is 60° and one of the fields has a magnitude of 1.2 × 10^–2 T. If the dipole comes to stable equilibrium at an angle of 15° with this field, what is the magnitude of other field?

A bar magnet of magnetic moment 1.5 J T^-1 lies aligned with the direction of a uniform magnetic field of 0.22 T.

What is the torque on the magnet in cases (i) and (ii)?

A positive charge q is distributed over a circular ring of radius a. It is placed in a horizontal plane and is rotated about its axis at a uniform angular speed ω. A horizontal magnetic field B exists in the space. The torque acting on the ring due to the magnetic force is ______.

A magnetised needle of magnetic moment 4.8 × 10^-2 Am² is placed at 30° with the direction of uniform magnetic field of magnitude 3 × 10^-2 T. What is the torque acting on the needle?

A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75°. One of the fields has a magnitude of 15 mT. The dipole attains stable equilibrium at an angle of 30° with this field. The magntidue of the other field (in mT) is close to ______.

Compass needle of magnetic moment m placed in a uniform magnetic field, experiences a torque equal to ______.

A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained 20 cm away from the centre of the magnet. If the earth¢s magnetic field (horizontal component) at this point be 0.3 gauss, the magnetic moment of the magnet is ______.

Which of the following is correct about magnetic monopole?