A galvanometer of resistance 50 Ω giving full-scale deflection for a current of 10 mA is to be changed into a voltmeter of range 100 V . What should be the value of resistance to be added in series with this galvanometer?

Question

A galvanometer of resistance 50 Ω giving full-scale deflection for a current of 10 mA is to be changed into a voltmeter of range 100 V . What should be the value of resistance to be added in series with this galvanometer?, 9950 Ω, 10025 Ω, 10000 Ω, 9975 Ω

MARKS App · Accepted Answer

V = I G + R 100 = R + 50 × 10 × 10 - 3 R + 50 = 10000 ⇒ R = 9950 Ω

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