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Q. |
Two three phase induction motors A and B are identical in all respects except that motor A has a larger air-gap than motor B. Which motor will have poorer power factor? |
A. | a |
B. | b |
C. | both a and b |
D. | neither a nor b |
Answer» A. a | |
Explanation: due to larger air gap of motor a, it will need more of exciting current. so the no load angle will increase and power factor will deteriorate. |
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