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1. |
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____? |
A. | 30° to 150°. |
B. | 30° to 180°. |
C. | 60° to 120°. |
D. | 60° to 180°. |
Answer» B. 30° to 180°. | |