Characteristics of separately excited DC generator are drawn by keeping _____(a) Field current and speed both constant(b) Field current and speed both variable(c) Field current constant and speed variable(d) Field current variable and speed constantThis question was posed to me by my college professor while I was bunking the class.The above asked question is from Characteristics of Separately Excited Generators topic in division DC Generator of DC Machines

Characteristics of separately excited DC generator are drawn by keepin

1.	Characteristics of separately excited DC generator are drawn by keeping _____(a) Field current and speed both constant(b) Field current and speed both variable(c) Field current constant and speed variable(d) Field current variable and speed constantThis question was posed to me by my college professor while I was bunking the class.The above asked question is from Characteristics of Separately Excited Generators topic in division DC Generator of DC Machines
Answer» Right CHOICE is (b) Field CURRENT and SPEED both variable The explanation is: The operation considered here assumes that the armature is driven at constant speed (by means of prime mover) and the field excitation (If) is adjusted to give RATED voltage at no-load and is then held constant at this value throughout the operation considered.

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