![Transistor as a switch](https://kumkoniak.com/113.png)
![transistor as a switch transistor as a switch](https://i.stack.imgur.com/ya9N8.png)
This is done by biasing the base of the transistor. Therefore, both NPN and PNPtypes of transistors are made to operate as On/Off type solid-state switches. When we use a switching transistor, the transistor base biasing voltage is applied in such a way that it always operates within its Active region.
![transistor as a switch transistor as a switch](https://cdn.instrumentationtools.com/wp-content/uploads/2016/08/instrumentationtools.com_transistor-as-switch-in-cut-off-region.png)
![transistor as a switch transistor as a switch](https://electrosome.com/wp-content/uploads/2012/11/transistor-as-a-switch.jpg)
Here we are going to explain to you how to use Transistor as a switch and testing a transistor using multimeters & switching circuits. In our previous tutorial, we have explained how to use a transistor as an oscillator and a transistor amplifier. A transistor is a semiconductor device used to switch or amplify electrical power and electronic signal.
![Transistor as a switch](https://kumkoniak.com/113.png)