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JAMB Physics 1985 Question 35

Question 35

Conduction through Liquids and Gases

A charge of one coulomb liberates 0.0033 g of copper in an electrolytic process. How long will it take a current of 2 A to librate 1.98 g of copper in such a process?

  1. A.5 minutes
  2. B.30 minutes
  3. C.50 minutes
  4. D.60 minutes
  5. E.120 minutes
Show the answer and explanation

Answer: A (5 minutes)

Explanation

Charge needed = 1.98/0.0033 = 600 C. t = Q/I = 600/2 = 300 s = 5 minutes.