How shunt field is controlled?(a) Diverter resistor in parallel(b) Tapped field winding(c) Series regulating resistance(d) Other methodsThe question was posed to me by my school principal while I was bunking the class.Query is from Methods of Excitation topic in portion Commutation Process & Excitation Methods of DC Machines

How shunt field is controlled?(a) Diverter resistor in parallel(b) Tap

1.	How shunt field is controlled?(a) Diverter resistor in parallel(b) Tapped field winding(c) Series regulating resistance(d) Other methodsThe question was posed to me by my school principal while I was bunking the class.Query is from Methods of Excitation topic in portion Commutation Process & Excitation Methods of DC Machines
Answer» The correct option is (c) Series regulating RESISTANCE The explanation is: Control of Excitation: 1) Shunt field: by a series regulating resistance.2) Series field: For small armature by a diverter resistance connected in parallel with series field. For large armature by tapped field WINDING so the winding TURNS can be changed.

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