scr silicon controlled rectifiers MCQs – Page 2

Practise focused scr silicon controlled rectifiers questions with marked answers for exam preparation and subject revision.

scr silicon controlled rectifiers Mcqs
21. An SCR is turned off when ________________?
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A. Gate voltage is reduced to zero

B. None of the above

C. Anode current is reduced to zero

D. Gate is reverse biased

22. The normal way to turn on a SCR is by______________?
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A. Breakover voltage

B. None of the above

C. Appropriate gate current

D. Appropriate anode current

23. If gate current is increased, then anode-cathode voltage at which SCR closes_________________?
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A. Is increased

B. None of the above

C. Remains the same

D. Is decreased
24. An SCR is made of silicon and not germanium because silicon _________________?
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A. Is mechanically strong

B. Has small leakage current

C. Is tetravalent

D. Is inexpensive

25. In the normal operation of an SCR, anode is __________ w.r.t. cathode?
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A. Positive

B. Negative

C. At zero potential

D. None of the above