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JAMB Physics 1991 Question 38

Question 38

Current Electricity

Which of the following obeys Ohm's Law?

  1. A.Glass
  2. B.Diode
  3. C.All electrolytes
  4. D.All metals
Show the answer and explanation

Answer: D (All metals)

Explanation

Metals at constant temperature have a constant V/I. Glass is an insulator, and diodes and many electrolytes do not have a constant V/I.