Current in a Transistor
- The current flows in the base, emitter and collector are called the base current (IB), the emitter current(IE) and the collector current(IC) respectively.
- The figure below shows the direction of the current in an npn transistor.
- 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