21. A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as
22. For V-curves for a synchronous motor the graph is drawn between
23. The armature current of the synchronous motor has higher values for
24. In which of the following motors the stator and rotor fields rotate simultaneously ?
25. A rotory converter can also be run as a
26. The oscillations in a synchronous motor can be damped out by
27. A synchronous motor can be used as a synchronous capacitor when it is
28. Slip-rings in a synchronous motor carry
29. An over-excited synchronous motor takes
30. While starting a synchronous motor by induction motor action, field winding is usually
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