A single phase full converter can operate in 4 quadrants 3 quadrants 2 quadrants

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Question
A single phase full converter can operate in
Options
A. 4 quadrants
B. 3 quadrants
C. 2 quadrants
D. 1 quadrant

Correct Answer

2 quadrants

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2. Thyristors connected in series need :
Options
A. static equalizing circuit
B. dynamic equalizing circuit
C. both static and dynamic equalizing circuits
D. none of the above

4. Assertion (A): The turn on time of SCR is about 1 to 4 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
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

6. In a thyristor, the forward breakover voltage
Options
A. is constant
B. may be constant or may depend on gate current
C. decreases as gate current is increased
D. increases as gate current is increased

7. A single phase half wave converter is feeding a resistive load. Output dc power is P_dc and total power delivered to load is P_ac then
Options
A. P_dc = P_ac for all values of firing angles
B. P_dc = P_ac if firing angle is less than 180�
C. P_dc < P_ac for all values of firing angles
D. P_dc < P_ac if firing angle is less than 180�

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