Answer / s.karthik

Hi there,

Basically TRIAC ,SCR ,JFET , UJT all are switches.
TRIAC-stands for triode AC
SCR-silicon controlled rectifier performs the operation of
rectification and inversion
JFET-junction field effect transistor
UJT-unijunction transistor,a transistor with a single junction

the features like the operating frequency,switching
frequency are different for each one of them

Answer / ali umair khan

triac , scr are thyristors(these are edge trigerred devices
and just need a input upto desired level at gate /base and
they keep in conduction)

JFET , ujt are transistors and are level trigered devices
abnd just need a constant base /drive signal to carry
cinduction

Answer / venkat

hii can u plss explain the working principle and its appplication in simpler words....

can any one send me previous ntpc exam papers at garima.12g@gmail.com?

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