MCQOPTIONS
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MCQOPTIONS
| 1. |
single-phase thyristor-bridge rectifier is fed from a \(230\;V,\;50\;Hz\), single-phase AC mains. If it is delivering a constant DC current of \(10\;A\), at firing angle of \({30^o}\), then value of the power factor at AC mains is |
| A. | 0.87 |
| B. | 0.9 |
| C. | 0.78 |
| D. | 0.45 |
| Answer» D. 0.45 | |