A galvanometer of resistance 100Ω is converted to a voltmeter of range 10 V by connecting a resistance of 10 k Ω . The resistance required to convert the same galvanometer to an ammeter of range 1 A i

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A galvanometer of resistance 100Ω is converted to a voltmeter of range 10 V by connecting a resistance of 10 k Ω . The resistance required to convert the same galvanometer to an ammeter of range 1 A is

TestHub · Accepted Answer

Here, V = 10 V , ​ R = 10 k Ω , G = 100Ω = 0.1 k Ω V = I g ​ ( G + R ) ; I g ​ ≈ 1 mA ​ ​ ( I − I g ​ ) S = I g ​ G or S = I − I g ​ I g ​ G ​ ​ = 1 − 1 × 1 0 − 3 1 × 1 0 − 3 × 100 ​ = 0.1Ω

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