A 200 V dc motor has external resistances of Ra and Rf in armature and – McqOptions

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1.	A 200 V dc motor has external resistances of Ra and Rf in armature and field circuits respectively. The starting current is reduced when?
A.	Ra is maximum and Rf minimum
B.	Rf is maximum and Ra minimum
C.	Ra is minimum and Rf minimum
D.	Ra is maximum and Rf maximum
Answer» B. Rf is maximum and Ra minimum

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