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A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is: O O 6 ohms 5.7 ohms 2.2 ohms 1.9 ohms

A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is: O O 6 ohms 5.7 ohms 2.2 ohms 1.9 ohms

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 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm ¡s: O O 6 ohms 5.7 ohms 2.2 ohms 1.9 ohms
Transcribed Image Text:A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm ¡s: O O 6 ohms 5.7 ohms 2.2 ohms 1.9 ohms
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