NPN and PNP Transistor
NPN transistor: It is created by sandwiching two N-type semiconductors with a thin layer of P-type semiconductors.
PNP transistor: It is created by sandwiching two P Type semiconductors with a thin layer of N-type semiconductor.
PN Junction diode applications:
- When reverse-biased, a P-N junction diode can be utilised as a photodiode because it is light-sensitive in this arrangement.
- It has a solar cell application.
- The diode can be employed in LED lighting applications when it is forward-biased.
- Therefore a transistor has 2 PN Junctions.
A transistor has ___ PN junctions. (a) 1 (b) 2 (c) 3 (d) 4
A transistor has 2 PN junctions. It functions as a voltage-controlled oscillator in varactors and as a rectifier in numerous electric circuits.
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