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Question: Silicon Controlled Rectifiers

The function of a snubber circuit connected across an scr is to

February 11, 2021 by Prabhat

A. Suppress dv/dt
B. Increase dv/dt
C. Decrease dv/dt
D. Keep transient voltage at a constant value

A snubber circuit is used in the scr control circuits to overcome the effects of

February 11, 2021 by Prabhat

A. Transients in the dc supply
B. Corona
C. Electromagnetism
D. Heating caused by the high voltage ac supply

For thyristors, pulse triggering is preferred over dc triggering because

February 11, 2021 by Prabhat

A. The gate dissipation is low
B. The pulse system is simpler
C. The triggering signal is required for a short duration
D. Of all of the above

The duration of the pulse in a pulse triggering system for scrs should be at least

February 11, 2021 by Prabhat

A. 60 us
B. 40 us
C. 20 us
D. 10 us

RC triggering is preferred over resistance triggering because

February 11, 2021 by Prabhat

A. Provides a large value of the triggering angle
B. Provides accurate triggering
C. Causes quick triggering
D. Protects the device from getting damaged

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