following is true?

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter33: Single-phase Motors
Section: Chapter Questions
Problem 17RQ
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Question
In a dc shunt motor, if the
armature resistance
increases then which of the
following is true?
а.
Back emf increase,
speed increase
b.
Back emf decrease,
speed decrease
С.
Back emf increase,
speed decrease
d.
Back emf decrease,
speed increase
Transcribed Image Text:In a dc shunt motor, if the armature resistance increases then which of the following is true? а. Back emf increase, speed increase b. Back emf decrease, speed decrease С. Back emf increase, speed decrease d. Back emf decrease, speed increase
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