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MHT CET 2024 (15 May, Shift 2) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from MHT CET 2024 (15 May, Shift 2)

Q66MHT CET 2024 · 15 MAY · SHIFT 2Medium

Kirchhoff's Laws & Measuring Instruments

A galvanometer may be converted into ammeter or a voltmeter. In which of the following cases the resistance of the device so obtained will be the largest?

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Answer: (d)

An ammeter has a small shunt in parallel, so its resistance is less than $G$ .
A voltmeter has a large series resistance: $R_V = \dfrac{V}{I_g}$ , which grows with the range.
Largest resistance: voltmeter of the higher range. So the answer is (d) voltmeter of range 10 V.

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