Answered: Question 3/ A 220-volt d.c. shunt motor…

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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Question 3/ A 220-volt d.c. shunt motor is running at a speed of 800 r.p.m. and draws 100 A. If the motor developing half the torque. Choose the correct answer. Take armature resistance is 0.1 ohm, and shunt field resistance is 110 ohm. Assume that the magnetic circuit is saturated. For this motor choose the correct answer

1- Armature current before the motor
develop half torque is
98 A
99 A
97 A
2- Armature current after the motor
develop half torque is *
49 A
48 A
50 A
3- Back e.m.f before the motor develop
half torque is *
O 210.2 V
O 208.2 V
O 212.2 V
4- Back e.m.f after the motor develop
half torque is*
O 215.1 V
O 217.1 V
O 213.1 V
5- The speed after the motor develop
half the torque is
O 818.6 r.p.m
820.6 r.p.m
O 816.6 r.p.m
O O

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