What is the function of a base in an NPN Transistor?

The most commonly used transistor configuration is the NPN Transistor. We also learnt that the junctions of the bipolar transistor can be biased in one of three different ways - Common Base, Common Emitter and Common Collector.

In this tutorial about bipolar transistors we will look more closely at the "Common Emitter" configuration using the Bipolar NPN Transistor with an example of the construction of a NPN transistor along with the transistors current flow characteristics is given below.