A thyristor circuit is feeding an R-L load. The turn on time can be reduced by d

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Question
A thyristor circuit is feeding an R-L load. The turn on time can be reduced by
Options
A. decreasing R
B. decreasing L
C. increasing L
D. decreasing R and L together

Correct Answer

decreasing L

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4. A cycloconverter for single phase operation has
Options
A. one positive group and one negative group converters
B. two positive group and two negative group converters
C. three positive group and three negative group converters
D. any of the above

5. The difference between resonant commutation and self commutation is
Options
A. both these methods are based on entirely different principles
B. in resonant commutation, the commutating elements carry load current but in self commutation, the commutating elements do not carry load current
C. resonant commutation uses L and C but self commutation uses only capacitor
D. none of the above

7. Assertion (A): An ac regulator uses natural commutation
Reason (R): An ac regulator can be used for static on load tap changing of transformer.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

10. In a cycloconverter it is possible to vary
Options
A. only output frequency
B. only output voltage
C. both output voltage and frequency but not simultaneously
D. both output voltage and output frequency simultaneously

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