A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is postioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

• A.  2 Nm.
• B.  100 Nm.
• C.   200 Nm.
• D.  1 Nm.

Answer: (C)