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A 3-phase induction motor when started picks up speed but runs stably at about half the normal speed. This is because of | |
A. | unbalance in the supply voltages. [Wrong Answer] |
B. | non-sinusoidal nature of the supply voltage. [Correct Answer] |
C. | stator circuit asymmetry [Wrong Answer] |
D. | rotor circuit asymmetry [Wrong Answer] |