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MPSC State Service 2018 · GS · Question 38 of 99

A resistor of 10 Ω connected across a cell of emf 12 V, draws the current of 1.1 A. Find the internal resistance of the cell.

Physics

  1. A10 Ω
  2. B0.1 Ω
  3. C10.9 Ω
  4. D0.91 ΩCorrect

Answer: D. 0.91 Ω

Explanation

Internal resistance r = (E − V)/I = (12 − 11)/1.1 ≈ 0.91 Ω.

Source: MPSC Rajyaseva Prelims 2018 GS Paper I (official paper)

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