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MHT CET 2026 (19 May, Shift 2) · Potentiometer

Potentiometer question from MHT CET 2026 (19 May, Shift 2)

Q6MHT CET 2026 · 19 MAY · SHIFT 2Easy

Potentiometer

In a potentiometer circuit when two cells of emf $1.6$ V and $1.3$ V are connected to assist each other, the balancing length is $290$ cm. What will be the balancing length in cm when these two cells are connected in opposition?

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Answer: (d)

$\frac{E_1 + E_2}{E_1 - E_2} = \frac{l_1}{l_2}$ .
$\frac{2.9}{0.3} = \frac{290}{l_2}$
$l_2 = 30\ \text{cm}$ .
So the answer is (d) 30.

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