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JAMB Physics 1980 Question 47

Question 47

Current Electricity

According to Ohm's law, the ratio V/I is constant for

  1. A.an electrolyte
  2. B.a diode
  3. C.a transistor
  4. D.silver
  5. E.all of the above
Show the answer and explanation

Answer: D (silver)

Explanation

Metals such as silver obey Ohm's law at constant temperature. Diodes, transistors and many electrolytes do not have a constant V/I.