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MHT CET 2026 (13 Apr, Shift 1) · Potentiometer

Potentiometer question from MHT CET 2026 (13 Apr, Shift 1)

Q5MHT CET 2026 · 13 APR · SHIFT 1Easy

Potentiometer

A potentiometer wire is 4 m long and potential difference of 3V is maintained between the ends. The e.m.f. of the cell which balances against a length of 100 cm of the poteniometer wire is

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Answer: (c)

Potential gradient $k = \dfrac{V}{L} = \dfrac{3}{4} = 0.75\text{ V/m}$ .
$E = k\,l = \dfrac{3}{4} \times 1$ .
$E = 0.75\text{ V}$ . So the answer is (c) $0.75$ V.

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