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.Management Sciences
A. short-circuiting of the secondaries
B. power factor of one of the transformers is leading while that of the other lagging
C. transformers having higher copper losses will have negligible core losses
D. loading of the transformers not in proportion to their kVA ratings
Related Mcqs:
- A transformer cannot raise or lower the voltage of a D.C. supply because_______________?
- A. there is no need to change the D.C. voltage B. a D.C. circuit has more losses C. Faraday’s laws of electromagnetic induction are not valid since the rate of change of flux is zero D. none of the above...
- Greater the secondary leakage flux____________?
- A. less will be the secondary induced e.m.f. B. less will be the primary induced e.m.f. C. less will be the primary terminal voltage D. none of the above...
- The core used in high frequency transformer is usually___________?
- A. copper core B. cost iron core C. air core D. mild steel core...
- Which type of winding is used in 3 phase shell-type transformer?
- A. Circular type B. Sandwich type C. Cylindrical type D. Rectangular type...
- Losses which occur in rotating electric machines and do not occur in transformers are___________?
- A. friction and windage losses B. magnetic losses C. hysteresis and eddy current losses D. copper losses...
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