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AP EAMCET20224 Jul 2022Morning ShiftPhysicsCurrent ElectricityActual

A cell can supply currents of 1 A and 0 . 5 A via resistances of 2 . 5 Ω and 10 Ω respectively. The internal resistance of the cell is

Options

  1. A2   Ω
  2. B3   Ω
  3. C4   Ω
  4. D5   Ω

Correct answer

D. 5   Ω

Step-by-step solution

Let the internal resistance of the cell be r and the potential difference be V . Then, 1 = V 2 . 5 + r And 0 . 5 = V 10 + r Solving the above two equations simultaneously, r = 5   Ω

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