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MHT CET 2026 (19 Apr, Shift 1) · Potentiometer

Potentiometer question from MHT CET 2026 (19 Apr, Shift 1)

Q7MHT CET 2026 · 19 APR · SHIFT 1Easy

Potentiometer

In a potentiometer circuit when two cells of e.m.f. $1.5$ volt and $1.2$ volt are connected to assist each other, balancing length is $270$ cm. What will be the balancing length in cm when these two cells are connected in opposition?

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Answer: (d)

$\frac{E_1 + E_2}{E_1 - E_2} = \frac{l_1}{l_2}$ .
$\frac{2.7}{0.3} = \frac{270}{l_2}$
$l_2 = 30\ \text{cm}$ .
So the answer is (d) 30.

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