A 230v DC series motor takes 30A when giving its rated output at 1400 rpm. It has a field resistance of 0.4 ohms. Calculate the value of the resistance (Ra) of the armature when Eb = 200v.

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...
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A 230v DC series motor takes 30A when giving its rated output at 1400 rpm. It has a field resistance of 0,4 ohms, Calculate the value of
the resistance (Ra) of the armature when Eb = 200V.
Select the correct response:
0.2 ohms
0.6 ohms
0.8 ohms
0.4 ohms
Transcribed Image Text:A 230v DC series motor takes 30A when giving its rated output at 1400 rpm. It has a field resistance of 0,4 ohms, Calculate the value of the resistance (Ra) of the armature when Eb = 200V. Select the correct response: 0.2 ohms 0.6 ohms 0.8 ohms 0.4 ohms
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