A galvanometer having a coil resistance 100 Ω gives a full scale deflection when a current of 1 m A is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter given full scale deflection for a potential difference of 10 V ?

Question

A galvanometer having a coil resistance 100 Ω gives a full scale deflection when a current of 1 m A is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter given full scale deflection for a potential difference of 10 V ?, 10 k Ω, 8.9 k Ω, 7.9 k Ω, 9.9 k Ω

MARKS App · Accepted Answer

V g = i g R g = 0.1 V V = 10 V R = R g V V g - 1 = 100 × 99 = 9.9 K Ω

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