Home » Ask Physics » Electromagnetic induction in outer space and energy conservation

Subscribe to this site by email

Loading

Electromagnetic induction in outer space and energy conservation

“lets pretend we are in space. and there  I have a permanent magnet rotor that and around it are copper windings. They do not touch and everything is floating with minimum friction (because we are in space)
imagine a generator with no brushes or bearings….

now my question is :
if i spin the rotor, and electrons start flowing on the copper(electricity)
would there be a negative force on the rotor to make it stop faster ?

Thank you

(Posted by )

Waiting for public response


1 Comment

  1. You are rotating the magnet => you are doing work. If you are considering that no external force is present (not even friction of air) then your work has to be totally converted into obtained work. By Lenz’s law there is a opposing force which is operating (the force responsible for current and is opposing the roter). But if I don’t think there would be any other force to stop it.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hits so far @ AskPhysics

  • 2,249,407 hits

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,338 other subscribers

November 2020
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
30  

Schrodinger’s Cat in Daily Life

%d bloggers like this: