Download Aptitude Crack
img not found img not found

Power Electronics - Engineering

Q1:

To turn off an SCR, it is necessary to reduce its current to less than :

A trigger current

B holding current

C breakover current

D none of the above

ANS:B - holding current

There are 2 ways to turn off an SCR.
1) Anode current interruption.
A) series- reducing anode current to zero.
B) parallel - reducing the anode current to a value less than the holding current.

2) Forced commutation.