Torque of e DC series motor is __________(a) Directly proportional to armature current(b) Inversely proportional to armature current(c) Directly proportional to square of armature current(d) Inversely proportional to square of armature currentI had been asked this question in a job interview.My question is taken from Operating Characteristics of DC Series Motor in portion Characteristics of DC Motors of DC Machines

Torque of e DC series motor is __________(a) Directly proportional to

1.	Torque of e DC series motor is __________(a) Directly proportional to armature current(b) Inversely proportional to armature current(c) Directly proportional to square of armature current(d) Inversely proportional to square of armature currentI had been asked this question in a job interview.My question is taken from Operating Characteristics of DC Series Motor in portion Characteristics of DC Motors of DC Machines
Answer» Right answer is (c) DIRECTLY proportional to square of ARMATURE current For explanation: Torque in a DC SERIES motor, in the case of linear magnetization VARIES directly with armature current square. Practically at higher values of armature current it tends to settle at constant value.

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