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MHT CET202122 Sep 2021Evening ShiftPhysicsCurrent ElectricityActual

In a potentiometer experiment, the balancing length for a cell 240 ~cm . On shunting the cell with a resistance of 2 , the balancing length become half the initial balancing length. The internal resistance of the cell is

Options

  1. A1.5
  2. B1
  3. C0.5
  4. D2

Correct answer

D. 2

Step-by-step solution

The internal resistance is given by aligned & r=R ( ₁- ₂ ₂ ) & =2 ( 240-120 120 )=2 aligned

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