224 6. The following table gives open-circuit voltages for different values of field current for a d.c. generator: Open-circuit voltage (V) Field current (A) 120 240 334 400 444 470 0.5 1-0 15 2:0 2:5 3.0 Express these values graphically and determine therefrom the generated e.m.f. when the shunt field circuit has à resistance of 200 2 Find also the critical resistance of the shunt field circuit. The effects of armature resistance and brush volt drop may be neglected. (E.M.E.U., 0.1)

224 6. The following table gives open-circuit voltages for different values of field current for a d.c. generator: Open-circuit voltage (V) Field current (A) 120 240 334 400 444 470 0.5 1-0 15 2:0 2:5 3.0 Express these values graphically and determine therefrom the generated e.m.f. when the shunt field circuit has à resistance of 200 2 Find also the critical resistance of the shunt field circuit. The effects of armature resistance and brush volt drop may be neglected. (E.M.E.U., 0.1)

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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