engineering physics MCQ #949

A cell of emf E and internal resistance r is connected to an external resistance R. The maximum power is delivered when?

engineering physics MCQ #949

  1. Question 1

    Q1. A cell of emf E and internal resistance r is connected to an external resistance R. The maximum power is delivered when?

    • A) R = 2r
    • B) R = r
    • C) R = r/2
    • D) R = 0

    Answer: R = r

    Explanation: Maximum power is delivered when R = r, as it maximizes the current.