Question

Show that a rectangular loop carrying a steady current and placed in a uniform magnetic field experience a torque and it does not experience a net force. derive expression for the torque on the loop.

Answer 1

Use Biot-Savart law to derive the expression for the magnetic field on the axis of a current carrying circular loop of radius R. Draw the magnetic field lines due to a convection

Answer 2

Answer:

A rectangular loop of size l×b carrying a steady current I is placed in a uniform magnetic field

→B. Prove that the torque →τ acting on the loop is given by

→τ=→m×→B,when →m is the magnetic moment of the loop .