Current Produced In A Coil By A Moving Magnet (Faraday's Law)

video embedded; This demo is also known as Galvo and Coil, or magnet and coil.
Type of activity: demo
Activity code:  M-006b

Description:

Demonstrates the law of electromagnetic induction (Faraday's law of induction)
  1. Connect the galvanometer to the coil using banana cords.
  2. Place galvanometer on overhead projector
  3. Insert bar magnet into coil
  4. Observe the needle deflect and then decay to zero
  5. Withdraw magnet from coil
  6. Observe the needle deflect in the opposite direction and decay to zero
  7. By changing the rate of insertion (faster / slower), the meter deflection will vary accordingly

The 600 turn coil can be used with a weaker bar magnet.


Older setup uses also a sensitivity meter (Adjust sensitivity meter to avoid damaging galvanometer).

 

Historical Diagram:


 

Video:


source: https://play.library.utoronto.ca/0bf6b77a9d94aedb81e0680546ccaab3

Apparatus

Galvanometer (projection)
Coil (300 turn)
Magnet (Bar)
Patch Cable (Banana)
Patch Cable (Banana)
ugdemos says:
Apr 30, 2013 09:55 PM
March 25, 2013 Jason Harlow
2pm-3pm PHY205 MP202
5pm-6pm PHY205 MP202
ugdemos says:
Aug 08, 2013 09:09 PM
March 27, 2013 Andrew Meyertholen
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5-6pm PHY131 MP102