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MHT CET 2020 (16 Oct, Shift 2) · Potentiometer

Potentiometer question from MHT CET 2020 (16 Oct, Shift 2)

Q65MHT CET 2020 · 16 OCT · SHIFT 2Easy

Potentiometer

Which of the following instruments is not a direct reading instrument?

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Answer: (b)

A potentiometer uses a null (comparison) method: the emf is found from a balancing length and a calculation, not read off a scale.
Balance, ammeter and voltmeter give direct readings.
So the answer is (b) Potentiometer.

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