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MHT CET202016 Oct 2020Morning ShiftPhysicsCurrent ElectricityActual

A 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. A0.50 V
  2. B0.60 ~V
  3. C3.0 .75 ~V
  4. D4.0 .25 ~V

Correct answer

C. 3.0 .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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