Mention the applications of a transistor.

Hint: A transistor is a device that works as a gate or switch for electrical signals and manages voltage or current flow. Three layers of a semiconductor material make up a transistor, each capable of conducting a current.

Complete step by step solution:
We will name each of the components where the transistors can be used and explain it.
1. Transistor as an amplifier: The transistor acts as an amplifier when it is in the active area. Because a minor change in base current creates a significant change in collector current, this is the case.
2. Transistor as a switch: When the transistor works in the cut-off (open switch) and saturation regions, it can be employed as a switch (closed switch).
3. Transistor amplifier as Oscillator: The transistor amplifier with positive feedback can work as an oscillator in presence of inductive coupling (or mutual inductance) or through an RC or LC network.
4. Integrated Circuits: Transistors, capacitors, diodes, and resistors are all joined on a single wafer-thin silicon chip to make an integrated circuit (IC).

So, the applications of a transistor are transistor as an amplifier, transistor as a switch, transistor amplifier as an Oscillator, and integrated circuits.

Note: Make sure to mention the uses of transistors that are used in our daily life to get a more clear idea about them. Explain where the transistors are used instead of why they are used. Do not explain the components of transistors that are used and just mention their applications.