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A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.1552 is connected to a 220 V supply and at a partic- ular load runs at 20 rev/s when drawing 20A from the supply. Calculate the e.m.f. gener- ated at this load. Determine also the speed of the motor when the load is changed such that the current increases to 25 A. Assume the flux increases by 25%. 3.

A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.1552 is connected to a 220 V supply and at a partic- ular load runs at 20 rev/s when drawing 20A from the supply. Calculate the e.m.f. gener- ated at this load. Determine also the speed of the motor when the load is changed such that the current increases to 25 A. Assume the flux increases by 25%. 3.

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 series motor having a series field resistance of 0.25 2 and an armature resistance of 0.15 52 is connected to a 220 V supply and at a partic- ular load runs at 20 rev/s when drawing 20A from the supply. Calculate the e.m.f. gener- ated at this load. Determine also the speed of the motor when the load is changed such that the current increases to 25 A. Assume the flux increases by 25%. 3.
Transcribed Image Text:A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.15 52 is connected to a 220 V supply and at a partic- ular load runs at 20 rev/s when drawing 20A from the supply. Calculate the e.m.f. gener- ated at this load. Determine also the speed of the motor when the load is changed such that the current increases to 25 A. Assume the flux increases by 25%. 3.
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