When a galvanometer is shunted by a resistance ' s ', its current capacity increases ' n ' times. If the same galvanometer is shunted by another resistance ' s₁ ', its capacity will increase to ' n₁ ' times original current. The value of ' n₁ ' is (a) ((n+s))/(s₁) (b) (s(n-1)-s₁)/(s₁) (c) ((n+1)s)/(s₁) (d) (s(n-1)+s₁)/(s₁)

Answer: (d). Shunt for n -fold range: s = (G)/(n - 1) ⇒ G = s(n - 1). With shunt s₁: n₁ = 1 + G/s₁ = 1 + (s(n - 1))/(s₁) n₁ = (s(n - 1) + s₁)/(s₁). So the answer is (d).

When a galvanometer is shunted by a resistance ' s ', its current… | MHT CET 2024 (4 May, Shift 2)

Q68MHT CET 2024 · 4 MAY · SHIFT 2Medium

Kirchhoff's Laws & Measuring Instruments

When a galvanometer is shunted by a resistance ' $s$ ', its current capacity increases ' $n$ ' times. If the same galvanometer is shunted by another resistance ' $s_1$ ', its capacity will increase to ' $n_1$ ' times original current. The value of ' $n_1$ ' is

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Answer: (d)

Shunt for $n$ -fold range: $s = \dfrac{G}{n - 1} \Rightarrow G = s(n - 1)$ .
With shunt $s_1$ : $n_1 = 1 + \dfrac{G}{s_1} = 1 + \dfrac{s(n - 1)}{s_1}$
$n_1 = \dfrac{s(n - 1) + s_1}{s_1}$ . So the answer is (d).

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Kirchhoff's Laws & Measuring Instruments question from MHT CET 2024 (4 May, Shift 2)

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