5K10.21 - Galvanometer w/ Coil and Magnet




Code: 5K10.21


Demo Title: Galvanometer w/ Coil and Magnet


Subject: Induced Currents and Forces


Description:
Explains how moving a magnet or coil changes the magnetic flux through the coil, inducing an electric current detected by a Galvanometer.


Procedure:

  • Show the students the compass needle placed near the coil and note that it sits still when undisturbed.
  • Bring a bar magnet near the compass to demonstrate its response to a magnetic field.
  • Introduce the coil connected to a Galvanometer and show that the needle starts at rest.
  • Move the magnet toward the coil and observe the Galvanometer needle deflect as current is induced.
  • Reverse the magnet's motion and note that the needle deflects in the opposite direction.
  • Pause the magnet inside the coil to show no current is generated without motion.
  • Move the magnet slowly, then quickly, to demonstrate how the speed of motion affects the Galvanometer reading.
  • Move the coil instead of the magnet and observe a similar response, reinforcing that it's the change in magnetic flux that induces current.

  • Video URL:


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