A rectangular loop of area A and carrying a steady current I is placed in a uniform magnetic field:-Derive the expression of torque, `tau`=`barmxxbarB` acting on the loop.

A coil carrying electric current is placed in uniform magnetic field.

A rectangular loop of area A and carrying a steady current I is placed in a uniform magnetic field:-Increasing the current sensitivity may not necessarily increase the voltage sensitivity of a galvanometer. Justify.

When a current carrying conductor is placed in a magnetic field it experiences a force. : Arrive at the expression for the force experienced by the conductor.