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Question 31622
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Current Electricity: Terminal Voltage MCQ

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Terminal VoltageEasyQuestion 31622

Question

Terminal voltage of a cell (EMF = E, internal resistance r) supplying current I is:
  1. A
    E + Ir
  2. B
    E − Ir
    Correct
  3. C
    Ir − E
  4. D
    E/r

Correct answer

E − Ir

Explanation

V = E − Ir. Internal resistance drops voltage by Ir during discharge. Terminal voltage < EMF.

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