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Thyristors and Tranducers - Technical MCQs

Q1:

Once a DIAC is conducting, the only way to turn it off is with:

A a positive gate voltage

B a negative gate voltage

C low-current dropout

D breakover

ANS:C - low-current dropout

DIAC has no gate terminal so A & B is wrong. At breakover voltage DIAC will start to conduct and current starts flowing. At low current drop out which is called holding current value, the DIAC will disconnecetd.