The range of an ammeter of resistance ' G can be increased from ' I ' to ' nI ' by connecting (a) a series resistance of (G)/(n + 1) Ω (b) a shunt of (G)/(n - 1) Ω (c) a shunt of (G)/(n + 1) Ω (d) a series resistance of (G)/(n - 1) Ω

Answer: (b). To increase the range a shunt is added in parallel: S = (Ig G)/(I' - Ig). With Ig = I and I' = nI: S = (IG)/(nI - I) = (G)/(n - 1) So the answer is (b) a shunt of (G)/(n - 1) Ω.

The range of an ammeter of resistance ' G can be increased from ' I '… | MHT CET 2019 (2 May, Shift 2)

Q149MHT CET 2019 · 2 MAY · SHIFT 2Easy

Kirchhoff's Laws & Measuring Instruments

The range of an ammeter of resistance ' $G$ can be increased from ' $I$ ' to ' $nI$ ' by connecting

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Answer: (b)

To increase the range a shunt is added in parallel: $S = \frac{I_g G}{I' - I_g}$ .
With $I_g = I$ and $I' = nI$ : $S = \frac{IG}{nI - I} = \frac{G}{n - 1}$
So the answer is (b) a shunt of $\frac{G}{n - 1}\ \Omega$ .

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Kirchhoff's Laws & Measuring Instruments question from MHT CET 2019 (2 May, Shift 2)

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