Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Counter emf generated in a motor at full speed
Reply to thread
Message
[QUOTE="lloyd21, post: 5305583, member: 578738"] [h2]Homework Statement [/h2] An electric motor draws 20.0 A of current when first switched on. The motors windings have a resistance of 5.0 ohm. Once the motor is up to full speed it draws only 4.4 A of current. Calculate the counter emf generated in the motor at full speed [h2]Homework Equations[/h2] I = V/R V=IR [h2]The Attempt at a Solution[/h2] R = 5.0 ohm A1 = 20.0 A A2= 4.4 A n 1. (20A)(5.0ohm) = 100 V 2. (4.4A)(5.0ohm) = 22V 3. 100V - 22V = 78V Im told I am missing some "change", however I think this is correct, it is change in voltage? [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Counter emf generated in a motor at full speed
Back
Top