200 V D.C. series motor runs at 500 r.p.m when taking a current of 25 A. The resistance of the armature is 0.5 ohm and that of filed is 0.3 ohm. If the current remains constant, calculate the resistance necessary to reduce the speed to 250
200 V D.C. series motor runs at 500 r.p.m when taking a current of 25 A. The resistance of the armature is 0.5 ohm and that of filed is 0.3 ohm. If the current remains constant, calculate the resistance necessary to reduce the speed to 250
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A 200 V D.C. series motor runs at 500 r.p.m when taking a current of 25 A. The
resistance of the armature is 0.5 ohm and that of filed is 0.3 ohm. If the current
remains constant, calculate the resistance necessary to reduce the speed to 250
r.p.m. (Ans.3.6 ohms)
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