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JAMB Physics 2010 Question 35

Question 35

Current Electricity

A cell of emf 12 V and internal resistance 4Ω is connected to an external resistor of resistance 2Ω. Find the current flow.

  1. A.4 A.
  2. B.2 A.
  3. C.3 A.
  4. D.5 A.
Show the answer and explanation

Answer: B (2 A.)

Explanation

I = E/(R + r) = 12 ÷ (2 + 4) = 2 A.