Why is a transistor called a current control device?

Why is a transistor called a current control device?

A transistor is called a current control device because it can control the flow of current through it by controlling the current flowing into its base terminal.

This is known as “current gain,” as the current flowing into the base terminal can be used to control a much larger current flowing through the collector and emitter terminals.

This allows for amplification and switching of electronic signals, making transistors a vital component in many electronic devices.