Electrical Machines
The power factor of squirrel cage induction motor is

 low at light loads only
 low at rated load only
 both A and B
 low at heavy loads only

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Electrical Machines
The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are

 1, 3, 4, 5
 2, 3, 4
 1, 2, 3, 4 and 5
 2, 3, 4, 5

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Electrical Machines
In synchronous generator, inverted V curve is drawn between

 field current on X-axis and power factor on Y-axis
 field current on Y-axis and armature current on X-axis
 field current on X-axis and armature current on Y-axis
 field current on Y-axis and power factor on X-axis

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