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Answer Posted / s.naveen kumar
we know that in a transistor we have three types of regions:
EMITTER, COLLECTOR, BASE, and we know that emitter is highly
doped, so charge carriers are very high, so resistance is
very less, and on the other side collector is moderately
doped so charge carriers are less, so resistance is very
high. So from the above concept we conclude that in a
transistor current is flowing from low resistance to high
resistance. for example the 100 electrons are moving from
emitter to base, in base only some (4 electrons) of the
electrons are neutralized, and remaining 96 electrons are
moved to collector terminal through high resistance path. so
now same current flowing through high resistance so voltage
amplified.
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