Electrical Machines
A DC series motor has which of the following characteristics?

 Has a almost constant speed.
 Can be started easily without load.
 Has a poor torque.
 Has its field winding consinting of thick wire and less no of turns.

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

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

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