Question 39
ElectronicsA transistor is used in the amplification of signals because it
- A.allows doping
- B.contains electron and hole carriers
- C.consumes a lot of power
- D.controls the flow of current.
Show the answer and explanation
Answer: D (controls the flow of current.)
Explanation
A transistor amplifies because a small current at the base controls a much larger current through the collector and emitter, so a weak signal is reproduced as a strong one.