MCQOPTIONS
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MCQOPTIONS
| 1. |
The power of system, three-phase 10 kVA load with a power factor of 0.342, is measured by two-wattmeter method. The readings of two wattmeters are W1 and W2. What can be said about these readings? |
| A. | When power factor is changed from lagging to leading, the reading of W1 and W2 increase. |
| B. | When power factor is changed from lagging to leading, the reading of W1 and W2 get interchanged. |
| C. | When power factor is changed from lagging to leading, the reading of W1 and W2 decrease. |
| D. | When power factor is changed from lagging to leading, the reading of W1 and W2 attain negative sign, always. |
| Answer» C. When power factor is changed from lagging to leading, the reading of W1 and W2 decrease. | |