Transistor Switching Circuit: How Transistor…

Transistor Switching Circuit: How Transistor Acts as a Switch

In an NPN transistor, Current starts flowing from collector to emitter only when a minimum voltage of 0.7V is supplied to the base terminal. When there is no voltage on Base terminal it works as an open switch between collector and emitter.

Know more about how a NPN or PNP transistor works as a switch: https://circuitdigest.com/electronic-circuits/npn-and-pnp-transistor-switching-circuit-diagram