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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

1 mA
2 mA
3 mA
4 mA

Correct Answer: 2 mA

Explanation:

NBAI = Controlling torque or

= 240 x 10^-6 or I = 2 mA.

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