silicon controlled rectifiers objective type questions and answers
Download PDF
Free download in PDF Silicon Controlled Rectifiers Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
When SCR starts conducting, then ……………. loses all control
[A]
Gate
[B]
Cathode
[C]
Anode
[D]
None of the above
Answer: Gate
(22)
We can control a.c. power in a load by connecting …………
[A]
Two SCRs in series
[B]
Two SCRs in parallel
[C]
Two SCRs in parallel opposition
[D]
None of the above
Answer: Two SCRs in parallel
(23)
An SCR can exercise control over ………. of a.c. supply
[A]
Positive half-cycles only
[B]
Negative half-cycles only
[C]
Both positive and negative half-cycles
[D]
Positive or negative half-cycles
Answer: Positive or negative half-cycles
(24)
When SCR is OFF, the current in the circuit is …………….
[A]
Exactly zero
[B]
Small leakage current
[C]
Large leakage current
[D]
None of the above
Answer: Small leakage current
(25)
If gate current is increased, then anode-cathode voltage at which SCR closes …………….