What is the function of transistors in electronic devices?

Transistors serve a crucial role in electronic devices primarily as switches and amplifiers for electrical signals. When used as a switch, a transistor can turn a current on or off, allowing it to control other components within a circuit. This is vital for creating digital logic and for functionality in computers and other digital devices.

As amplifiers, transistors boost the strength of electrical signals. This capability is essential in audio equipment, radio transmitters, and various communication devices where maintaining signal integrity is critical. Essentially, the ability to control the flow of current and amplify signals underlies much of modern electronics, making transistors fundamental to their operation.

The focus on switching and amplification distinguishes transistors from components designed for generating voltage, rectifying current, or storing energy, which are functions associated with other devices such as batteries, diodes, and capacitors, respectively.