Interested to Buy Any Domain ? << Click Here >> for more details...
What is UJT PNP, NPN transistor & working principles?
- 1 Answers
- 12772 Views
- TATA, I also Faced
- E-Mail Answers
Answer Posted / saiful islam
PNP configuration
NPN AND PNP
PNP transistor:
When common base connection of a NPN transistor.In the
forward bias connection of the first PN junction ,it causes
the majority charge carrier(holes) in the P-type ,flow from
emitter to the base region .This constitutes the emitter
current (Ie) in the transistor.As these majority carrier
(hole) cross in to N-type base .They are combine with the
electron .Only the few hole (i.e less than 5%) combine with
the electrons ,because the base of this transistor is
lightly doped and very thin .Expects those holes ,all other
i.e More than 95% cross in to the collector region.This
constitutes collector current (Ic). In this process ,almost
the whole emitter current (holes) flows into the collector
region .So in this transistor ,current conduction in the
circuit is by holes.
Ie=Ic+Ib
Where ,
Ie=emitter current,
Ic=collector current and
Ib=base current
NPN transistor:
When common base connection of a NPN transistor .In the
forward bias connection of the NP junction,it causes the
majority charge carrier(electrons)in the N-type ,flow from
emitter to the base region.This constitutes the emitter
current(Ie) in the transistor.As these majority
carrier(electrons)cross in to the P-type base.They are
combine with the holes.Only the few electrons(i.e less than
5%) combine with the holes ,because of this transistor is
lightly doped and very thin.The remainder i.e more than 95%
cross into the collector region.This constitutes collector
current (Ic).In this way the whole emitter current
(electrons)flows into the collector region .So in this
transistor, current conduction in this circuit is by electrons.
| Is This Answer Correct ? | 13 Yes | 5 No |
Post New Answer View All Answers
what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV
how a flip flop can be used as a latch?
how to get electrical supervisour certificate in gujarat
How to work meggar?
How to calculate or formula to calculate rhe power in 2 phase system ??
what are the pecularity of shaver sockets ?
What is load boxes ?
I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.
what is mean by transition resistance of transformer?
Explain Creepage Distance of Insulator
What are the roles and responsibilities of electrical engineer in cement plant
What is the end effect of linear induction motor ??
What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?
What are the causes for the failures of sandwich type (Al) busducts?
Please explain me abt PQ diagaram in the power sector.
