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JAMB Physics 2005 Question 22

Question 22

Current Electricity

A car battery rated 45 AH is charged with a charger whose rating is 2.5 A. How long will it take to charge the battery fully?

  1. A.20 hrs
  2. B.10 hrs
  3. C.25 hrs
  4. D.18 hrs
Show the answer and explanation

Answer: D (18 hrs)

Explanation

Time = capacity ÷ current = 45 A h ÷ 2.5 A = 18 h.