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JAMB Physics 2006 Question 9

Question 9

Electronics

A p-n junction diode is used as

  1. A.a rectifier in a d.c. circuit.
  2. B.an amplifier in an a.c.circuit.
  3. C.a rectifier in an a.c circuit.
  4. D.an amplifier in a d.c. circuit.
Show the answer and explanation

Answer: C (a rectifier in an a.c circuit.)

Explanation

A diode lets current flow in one direction only, so it is used to rectify (change a.c. to d.c.) in an a.c. circuit. It cannot amplify.