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MHT CET 2026 (17 Apr, Shift 1) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2026 (17 Apr, Shift 1)

Q17MHT CET 2026 · 17 APR · SHIFT 1Medium

Kirchhoff's Laws & Measuring Instruments

With a resistance ' $X$ ' connected in series with a galvanometer of resistance $100\ \Omega$ , it acts as a voltmeter of range 0 - 15 V. To double the range, a resistance of $1500\ \Omega$ is to be connected in series with ' $X$ '. The value of ' $X$ ' in $\Omega$ is

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Answer: (c)

Range $V = I_g(G + R)$ : $I_g(100 + X) = 15$ .
Double range: $I_g(100 + X + 1500) = 30$
Divide: $1600 + X = 2(100 + X) \Rightarrow X = 1400\ \Omega$
So the answer is (c) 1400.

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