Thyristors and Tranducers - Technical MCQs

Q1:

Which is the DIAC?

A mca14_10012a1.gif

B mca14_10012b1.gif

C mca14_10012c1.gif

D mca14_10012d1.gif

ANS:A - mca14_10012a1.gif

DIAC is a two electrode, bidirectional avalanche diode which can conduct when any one terminal is made positive with respect to other.

As the voltage across one terminal will reach its breakover voltage the device will start conducting.