In a DC machine, how coil-side emf varies towards the outer side of poles?(a) Decreases(b) Remains same(c) Increases(d) First increases the decreasesThe question was asked by my college director while I was bunking the class.My doubt stems from Armature Winding and Commutator in portion Armature Windings of DC Machines

In a DC machine, how coil-side emf varies towards the outer side of po

1.	In a DC machine, how coil-side emf varies towards the outer side of poles?(a) Decreases(b) Remains same(c) Increases(d) First increases the decreasesThe question was asked by my college director while I was bunking the class.My doubt stems from Armature Winding and Commutator in portion Armature Windings of DC Machines
Answer» The correct ANSWER is (a) Decreases Best explanation: Coil side current pattern is the same as the emf pattern. Only difference is that while the coil-side emf reduces towards the outer side of poles, the current remains the same in all the coil-sides EXCEPT for ALTERATIONS from pole to pole, while the coil side current reverses, the current EXCHANGED with external circuit must be unidirectional.

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