What is the magnitude of torque which acts on a coil carrying current placed in a uniform radial magnetic field?

A coil carrying electric current is placed in uniform magnetic field

A coil carrying electric current is placed in uniform magnetic field

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

Give force acting on a current carrying conductor placed in a uniform magnetic field.

Calculate the torque acting on a rectangular coil carrying current I placed in a uniform magnetic field when the plane of the coil is perpendicular to the magnetic lines of force.