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1. |
In a 3 phase semi-converter, firing angle = 120° and extinction angle = 110°. Each SCR and freewheeling diode conducts respectively for |
A. | 60°, 50° |
B. | 30°, 50° |
C. | 60°, 10° |
D. | 30°, 40° |
Answer» B. 30°, 50° | |