MOSFET:A field-effect transistor (FET) is a type of semiconductor device used to control the flow of electrical current, commonly for amplifying or switching signals. Its unique feature is that it uses an “electric field” to control the flow of current. FETs operate quickly and consume low power, making them ideal for circuits that require frequent switching. You can think of them as an “electronic gate” — the electric field determines whether the gate is open or closed, controlling the flow of current.