1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Electromagnetic induction near a generator

  1. Jul 3, 2012 #1
    Hi , i am a highschool student ( class 10 ) and after reading about electromagnetic induction iwas thinking about what if u place a wire coil connected to a circuit in the magnetic field / near a generator ? Because electricity is turned of for a fraction of a second there will be great variation of magnetic field which would induce current in the coil ? Am i incorrect ?
     
  2. jcsd
  3. Jul 3, 2012 #2
    Yes, in principle. However, well-designed generators and transformers use iron cores to guide magnetic fields lines for maximum efficiency so that the stray magnetic field is very small and not really usable. It may be measureable, though.

    http://en.wikipedia.org/wiki/Magnetic_core
     
  4. Jul 3, 2012 #3
    oo thanks buddy but tell me how much rotation speed of magnets i need to induce a small amount of current like lighting a really small bulb ?
     
  5. Jul 3, 2012 #4

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    Connect an LED to a small motor from a battery powered toy.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Electromagnetic induction near a generator
Loading...