Electrical Machines
For a DC machine having P no of pole pairs Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for lap-winding ?

 PZL/4S
 PZL/4Sa²
 PZL/4SP²
 PZL/ 4Sa

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Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

 1/2 times maximum value of flux due to any phase
 3 times maximum value of flux due to any phase
 equal to φm, where φm is the maximum flux due to any phase
 3/2 times maximum value of flux due to any phase

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