The resistance of a moving coil galvanometer is 20 Ω . It requires 0 .01 A current for full-scale deflection. The value of resistance to convert it into a voltmeter of the range 20 V will be

Question

The resistance of a moving coil galvanometer is 20 Ω . It requires 0 .01 A current for full-scale deflection. The value of resistance to convert it into a voltmeter of the range 20 V will be, 198 Ω, 1980 Ω, 20 Ω, 0 Ω

MARKS App · Accepted Answer

V G = I G G V G = 0.01 × 20 = 0.2 V R = V V G - 1 G R = 20 0.2 - 1 20 = 1980 Ω

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