The current flow from collector to emitter in the NPN transistor when the positive supply is applied to the base is vital variations between the NPN vs PNP.

In the presence of this junction, current can start to flow from one side to the other. In the case of Brattain's transistor, current flowed towards the second gold contact. Think about what that ...

Metal-Oxide-Semiconductor (MOS) Transistors N-MOS and P-MOS transistors are analogous respectively to NPN and PNP transistors but their conduction mechanism is based completely on one type of carrier: ...

The npn and pnp transistors used in the circuit should be high current- gain (hfe > 100) devices with minimum 2-A continuous current drive capacity (see the figure).

Defects in a transistor can interfere with the reliable flow of current and significantly degrade the performance of transistors.