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MHT CET 2026 (16 Apr, Shift 1) · Potentiometer

Potentiometer question from MHT CET 2026 (16 Apr, Shift 1)

Q3MHT CET 2026 · 16 APR · SHIFT 1Easy

Potentiometer

A potentiometer wire is 4m 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 potentiometer wire is

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Answer: (a)

  1. Potential gradient k=VL=34=0.75 V/mk = \dfrac{V}{L} = \dfrac{3}{4} = 0.75\text{ V/m}.
  2. E=k l=34×1E = k\,l = \dfrac{3}{4} \times 1.
  3. E=0.75 VE = 0.75\text{ V}. So the answer is (a) 0.750.75 V.
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