How do you know if a transistor is a PNP or an NPN?

Answer:
To know if a transistor is PNP or an NPN,the following should be verified:
  1. For a PNP transistor, the base-collector junction is forward biased while the base-emitter junction is reversed biased.
  2. For an NPN transistor, the base-emitter junction is forward biased while the base -collector junction is reversed biased.
First answer by Rundstel. Last edit by Rundstel. Contributor trust: 11 [recommend contributor recommended]. Question popularity: 1 [recommend question].