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C series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.15 ohms and 0.1 ohms respectively. Find the speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.

C series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.15 ohms and 0.1 ohms respectively. Find the speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A DC series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.15 ohms and 0.1 ohms respectively. Find the speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.
12. A DC series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.152 and 0.12 respectively. Find the II speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.
Transcribed Image Text:12. A DC series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.152 and 0.12 respectively. Find the II speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.
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