A moving-coil voltmeter has the coil with 100 turns and is 4 cm long and 3 cm wide. If it carries 25 mA of current and the flux density in the air gap is 0.06 Wb/m2 , find the deflecting torque.
1
9 × 10-5 N-m
2
18 × 10-5 N-m
3
9 × 10-6 N-m
4
18 × 10-6 N-m