MCQOPTIONS
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| 1. |
Can a 50 Hz transformer be used for 25 Hz, if the input voltage is maintained constant at the rated vale corresponding to 50 Hz? |
| A. | Yes. Since the voltage is constant, current levels will not changed. |
| B. | No. Flux will be doubled which will drive the care to excessive saturation |
| C. | No. Owing to decreased reactance of transformer, input current will be doubled atload |
| D. | Yes. At constant voltage, insulation will not be overstressed. |
| Answer» C. No. Owing to decreased reactance of transformer, input current will be doubled atload | |