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A d.c. shunt motor runs at 500 r.p.m. on a 200 V supply. Its armature resistance is 0.5 Q and the current taken is 30 Amp in addition to field current. What resistance must be placed in series with armature to reduce the speed to 300 rpm ? The current in armature remains the same.

A d.c. shunt motor runs at 500 r.p.m. on a 200 V supply. Its armature resistance is 0.5 Q and the current taken is 30 Amp in addition to field current. What resistance must be placed in series with armature to reduce the speed to 300 rpm ? The current in armature remains the same.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A d.c. shunt motor runs at 500 r.p.m. on a 200 V supply. Its armature resistance is 0.5 02 and the current taken is 30 Amp in addition to field current. What resistance must be placed in series with armature to reduce the speed to 300 rpm ? The current in armature remains the same.
Transcribed Image Text:A d.c. shunt motor runs at 500 r.p.m. on a 200 V supply. Its armature resistance is 0.5 02 and the current taken is 30 Amp in addition to field current. What resistance must be placed in series with armature to reduce the speed to 300 rpm ? The current in armature remains the same.
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