POWER ELECTRONICS-MCQ

1. SCR is used for current control in........

A. dc circuit only
B. ac circuit only
C. both a and b
D. none of these

Ans: C

2.  An inductor is connected in series with SCR to protect it against

A. damage due high dv/dt
B. damage due to high di/dt
C. damage due to large forward current
D. none of these

Ans: B

3.In a SCRs

(a) Both Latching current and holding current are associated with turn-off process
(b) Latching current is associated with turn-off process and holding current with turn on process
(c) Holding current is associated with turn-off process and Latching current with turn-on process
(d) Both Latching current and holding current are associated with turn on process

Ans: c