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Silicon Controlled Rectifiers Quiz | Silicon Controlled Rectifiers Objective Type Questions and Answers

Questions
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
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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 …………….
A Is decreased
B Is increased
C Remains the same
D None of the above

Answer: Is decreased

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