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/ 4Sa
 PZL/4SP²
 PZL/4S
 PZL/4Sa²

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Electrical Machines
A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine

 armature winding has thin leads whereas field winding has thick leads
 both the windings have thin leads
 armature winding has thick leads whereas field winding has thin leads
 both the windings have thick leads

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