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MHT CET 2026 (19 Apr, Shift 2) · Moving Coil Galvanometer, Ammeter & Voltmeter

Moving Coil Galvanometer, Ammeter & Voltmeter question from MHT CET 2026 (19 Apr, Shift 2)

Q9MHT CET 2026 · 19 APR · SHIFT 2Medium

Moving Coil Galvanometer, Ammeter & Voltmeter

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′S'', its current capacity will increase to 'n′n' '. The value of n in terms of n′n', S and S′S' is

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Answer: (d)

  1. For a shunt SS: n=IIg=1+GSn = \frac{I}{I_g} = 1 + \frac{G}{S}.
  2. With S′S': n′=1+GS′⇒G=S′(n′−1)n' = 1 + \frac{G}{S'} \Rightarrow G = S'(n'-1).
  3. n=1+S′(n′−1)S=S+S′(n′−1)Sn = 1 + \frac{S'(n'-1)}{S} = \frac{S + S'(n'-1)}{S}
  4. So the answer is (d).
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