4. The back e.m.f. in a d.c. motor ....... the applied voltage and when it is equal to applied voltage the mechanical power will be maximized. 5. The deciding factor in the selection of a d.c. motor for a particular application is its oborootor

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter5: Resistors
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4.
The back e.m.f. in a d.c. motor
....... the applied voltage and when it is equal to
applied voltage the mechanical power will be maximized.
5. The deciding factor in the selection of a d.c. motor for a particular application is its
oborootor
Transcribed Image Text:4. The back e.m.f. in a d.c. motor ....... the applied voltage and when it is equal to applied voltage the mechanical power will be maximized. 5. The deciding factor in the selection of a d.c. motor for a particular application is its oborootor
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Step 1

4.back emf opposes the applied voltage. and when the back emf is equal to half of the applied voltage . dc motor works 

on maximum efficiency.

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