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JAMB Physics 2004 Question 49

Question 49

Current Electricity

A cell whose internal resistance is 0.5Ω delivers a current of 4A to an external resistor. The lost voltage of the cell is

  1. A.1.250V.
  2. B.8.000V.
  3. C.0.125V.
  4. D.2.000V.
Show the answer and explanation

Answer: D (2.000V.)

Explanation

Lost volts = Ir = 4 × 0.5 = 2 V.