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MHT CET20228 Aug 2022Morning ShiftPhysicsCurrent ElectricityActual

Potentiometer wire is 4 ~m long and potential difference of 3 ~V 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

Options

  1. A0.60 V
  2. B0.20 V
  3. C0.45 V
  4. D0.75 V

Correct answer

D. 0.75 V

Step-by-step solution

Potential gradient = 3 4 V m So, emf against 100 ~cm = 3 4 1 ~V =0.75 ~V

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