A cell of e.m.f. 9 V and internal resistance 2 Ω is connected to a 7 Ω resistor. The terminal p.d. is:

  1. 7 V
  2. 14 V
  3. 3.5 V
  4. 70 V
Answer

A) 7 V

I = mathcalER + r = 1 A; V = IR = 7 V (lost volts Ir = 2 V). SLO P-09-E-17 · Understanding

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