The following table gives open-circuit voltages fer dierent values of field current for a d.e. generator: Open-circuit voltage (V) Field current (A) 120 240 334 400 444 470 05 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 a resistance of 200 0 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) 6. The following table gives open-circuit voltages fer different values offield current for a d.c. generator:Open-circuit voltage (V)Field current (A)120 240 334 400 444 47005 1-0 15 2:0 2-5 3-0Express these values graphically and determine therefrom thegenerated e.m.f. when the shunt field circuit has a resistance of 200 0Find also the critical resistance of the shunt field circuit. The effectsof armature resistance and brush volt drop may be neglected.(E.M.E.U., 0.1)

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Answered: 6. The following table gives…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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The following table gives open-circuit voltages fer dierent values of field current for a d.e. generator: Open-circuit voltage (V) Field current (A) 120 240 334 400 444 470 05 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 a resistance of 200 0 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)

6. The following table gives open-circuit voltages fer different values of
field current for a d.c. generator:
Open-circuit voltage (V)
Field current (A)
120 240 334 400 444 470
05 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 a resistance of 200 0
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)

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