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Current Electricity: Cells in Parallel MCQ

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Cells in ParallelMediumQuestion 31627

Question

Three identical cells (EMF E, internal resistance r each) in parallel supply current to external resistance R. Equivalent EMF and internal resistance are:
  1. A
    3E and 3r
  2. B
    E and 3r
  3. C
    E and r/3
    Correct
  4. D
    3E and r/3

Correct answer

E and r/3

Explanation

Identical cells in parallel: net EMF = E (same), internal resistance = r/3 (parallel combination).

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