The terminal p.d. V of a source with e.m.f. mathcalE and internal resistance r delivering current I is:

  1. V = mathcalE + Ir
  2. V = mathcalE - Ir
  3. V = mathcalEIr
  4. V = Ir
Answer

B) V = mathcalE - Ir

Lost volts inside the source. SLO P-09-E-17 · Understanding

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