Electrical Machines
An ideal synchronous motor has no starting torque because

  relative velocity between stator and rotor mmf’s is not zero.
 relative velocity between the stator and rotor mmf’s is zero.
 rotor is made up of salient poles.
 rotor winding is highly reactive.

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Electrical Machines
In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed?

 The speed will remains almost constant.
 The speed will increase abruptly.
 The speed will increase in proportion to reduction in load.
 The speed will increase gradually.

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Electrical Machines
What is/are the necessary conditions for voltage build up in self excited generator?

All of these
 Poles should contain residual flux.
 Field winding should be properly connected to armature winding.
 Field winding resistance should be less than critical resistance.

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