Electromagnetic Induction Help Required

Discussion in 'The Projects Forum' started by erashish14, Mar 21, 2016.

  1. erashish14

    Thread Starter New Member

    Apr 27, 2011
    4
    0
    Hi Experts,

    I'm doing an experiment of Electromagnetic Induction (producing current by changing magnetic field i.e. by circulating magnetic wheel of N52 Neodymium Magnets around copper coil),

    but what i found

    when the speed of wheel is HIGH, the Output Current is LOW (in range of .02 microAmp) &

    when wheel is about to stop i.e. when its speed is LOW, the Output Current is HIGH (in range of .11 microAmp)

    check the video once (),


    Kindly suggest where i'm doing wrong or what i need to change in my experiment, because as per Faraday's law, more frequent change in magnetic field produces more current, but its not seen in my experiment


    Kindly help

    Thanks in Advance
    Ashish
    "Solar Roof on Roads with Rain Water Harvesting & Advertisements"
    http://lightenmyways.blogspot.com/
     
  2. TheButtonThief

    Active Member

    Feb 26, 2011
    219
    38
    What load are you using? expect strange readings when you measure current with no load.
     
  3. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
    1,438
    368
    Measurement error. I keep seeing the minus sign appearing on the meter, is it set to DC?
     
    GopherT likes this.
  4. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,997
    3,756
    @erashish14

    Set your meter to AC volts.

    Try again.

    Then try with the coil of wire in different orientations (with hole of spool
    - left to right
    - front to back
    - top to bottom
    )
     
  5. DickCappels

    Moderator

    Aug 21, 2008
    2,648
    632
    Per blocco, put your meter on an AC scale.

    You can increase the output by putting a magnetic core in the coil.
     
  6. hp1729

    Well-Known Member

    Nov 23, 2015
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    219
    It takes a while for the meter to react. What does the output look like on a scope?
     
  7. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,779
    1,103
    Because each magnet in turn moves towards and then away from the coil the coil produces an AC voltage. The averaged reading on a DC scale will be zero.
     
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