The arrow in NPN transistor point outwards from the base terminal while the direction of arrow points inwards in PNP transistor. The direction of the arrow indicates the direction of current in the transistor. The circuit symbol of NPN and PNP transistor resembles each other except the direction of the arrow on the emitter.The conduction of NPN transistor is high than that of PNP because the mobility of electrons is more in comparison to that of holes.The direction of flow of current in NPN transistor is from collector to emitter while the direction of current in PNP transistor is from the emitter to collector.On the contrary, the emitter terminal of PNP transistor is connected to the positive terminal of the battery. The emitter terminal of NPN transistor is connected to the negative terminal of the battery. ![]()
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