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Measurements and Instrumentation

Q1:

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

A 1 mA

B 2 mA

C 3 mA

D 4 mA

ANS:B - 2 mA

NBAI = Controlling torque or = 240 x 10-6 or I = 2 mA.



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