# Current in Transistor

### Current in a Transistor

1. The current flows in the base, emitter and collector is called the base current (IB), the emitter current(IE) and the collector current(IC) respectively.
2. Figure below shows the direction of the current in an npn transistor.
3. In general, IE is related to IB and IC through the formula

IE = IB + IC

Another thing that you need to know about the 3 currents is

IE > IC > IB