Does transistor amplify AC or DC?

A transistor can amplify both AC and DC signals. However, it is more commonly used to amplify AC signals. This is because AC signals are easier to transmit and process than DC signals. To amplify an AC signal, the transistor is biased so that it is operating in the linear region of its transfer curve.

Transistors are essential components in the realm of electronics, and they play a crucial role in amplifying and controlling electrical signals. When it comes to whether a transistor amplifies AC (Alternating Current) or DC (Direct Current) signals, the answer is clear: transistors can amplify both AC and DC signals, depending on their configuration and application.