Technician: Amplifier Components

Which of the following electronic components can amplify signals? [T6B05]

A. Transistor
B. Variable resistor
C. Electrolytic capacitor
D. Multi-cell battery

The answer is, as luck would have it, A. Transistor.  The transistor is probably the miracle of 20th century technology.  It’s an amplifier, a switch, and so much more.

None of the other components listed have the ability to amplify a signal.

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