In a DC series motor, the electromagnetic torque developed is proportional to ______(a) Ia(b) Ia^2(c) Ia^3(d) Ia^.5The question was asked during an interview.This intriguing question originated from Dynamics in section Dynamics of Electrical Drives of Electric Drives

In a DC series motor, the electromagnetic torque developed is proporti

1.	In a DC series motor, the electromagnetic torque developed is proportional to ______(a) Ia(b) Ia^2(c) Ia^3(d) Ia^.5The question was asked during an interview.This intriguing question originated from Dynamics in section Dynamics of Electrical Drives of Electric Drives
Answer» Correct CHOICE is (b) Ia^2 Explanation: In a DC SERIES motor, the electromagnetic torque developed is EQUAL to KmΦIa. In a DC series, the motor field winding is CONNECTED in series with the armature so the flux in the field winding is proportional to CURRENT. T = KmΦIa α Ia^2.

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