Discussion
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240 x 10-6 N-m on full scale. If B = 1 Wb/m2, range of meter is
Answer: B
NBAI = Controlling torque or 
= 240 x 10-6 or I = 2 mA.
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