Question: A D . C . series motor operates at 8 0 0 r . p . m . with a line current of 1 0

A D.C. series motor operates at 800r.p.m. with a line current of 100 A from 230-V mains. Its armature circuit resistance is 0.15 and its field resistance 0.1. Find the speed at which the motor runs at a line current of 25 A , assuming that the flux at 25 A current is 0.45 times of the flux at 100 A .
A D . C . series motor operates at 8 0 0 r . p .

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