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
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
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
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