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Wednesday, 15 April 2026
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Physics Past Questions and Answers

Topic: Uses of semiconductors and diodes in rectification and transistors in amplification

Jamb Physics Questions - Uses of semiconductors and diodes in rectification and transistors in amplification

Question 1:
A transistor is used in the amplification of signals because it
  • A Controls the flow of current
  • B Consumes a lot of power
  • C Allows doping
  • D Contains electron and hole carriers
View Answer & Explanation
Question 2:
In an a.c circuit that contains only a capacitor, the voltage lags behind the current by
  • A 180°
  • B 90°
  • C 60°
  • D 30°
View Answer & Explanation
Question 3:
I. for current amplification.
II. for voltage stabilization.
III. for power amplification.
IV. as a switch.
which of the above are the uses of transistor?
  • A I,II,III and IV
  • B I,III, and IV only
  • C I, II and III only
  • D I,II and IV only
View Answer & Explanation