Physics Demonstrations
Department of Physics and Astronomy
Physics Demonstrations

Magnetization vs. Electrification

Identifier: E&M: M - 004

Magnet + magnet on rotating stand

Concept Overview:

Magnetization has no effect on electrical behavior.

Lecturer Procedure

Step(s) to FollowExpected Result
  1. Bring one end of the bar magnet toward each end of the mounted bar magnet.
The magnet will either attract or repel the end (you can rotate the magnet rapidly on its mount)
  1. Bring both sides of the bar magnet near the compass needle.
The red end of the needle will attract to the red end of the magnet; yellow end of needle will attract to yellow end of magnet.
  1. Charge PVC rod by rubbing it with kleenex.
  2. Bring it to one end of the mounted magnet.
  3. Bring it to the other end of the mounted magnet.
The PVC rod will attract both ends of the magnet.
  1. Place aluminum rod on rotating mount.
  2. Repeat steps in previous box.
Attraction will occur again.
  1. Set compass base on an insulating base.
  2. Charge compass needle by contact or induction from PVC rod.
  3. Bring PVC rod to compass.
Compass will be repelled by the charge.

 

Tutorial: Set-up instructions for E&M: M - 4

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