An 80-turn rectangular coil of area 250cm2 carries a current of 0.5A. The plane of the coil is parallel to a uniform magnetic field of 0.2T. Find the magnitude of torque acting on the coil when it is in this position.
a) 0.10Nm
b) 0.40Nm
c) 0.20Nm
d) 0.05Nm