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Measurements and Instrumentation - Engineering

Q1:

The coil of a moving iron instrument has a resistance of 500 Ω and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 Ω, its reading when fed by 250 V, 50 Hz ac will be

A 260 V

B 252 V

C 250 V

D 248 V

ANS:D - 248 V