Physics Demonstrations
Department of Physics and Astronomy
Physics Demonstrations

Jumping Rings

Identifier: E&M: Ind - 010

Electromagnet with iron core sits next to power stat.

Concept Overview:

  1. Lenz's Law
  2. Electromagnetic Induction

Lecturer Procedure

Task(s)Expected Result
  1. Place aluminum ring on core.
  2. Press the tap switch.
Ring will be launched from core.
  1. Place ring with a break in it on the core.
  2. Press the tap switch
Ring will not be launched.

Variation: For added effect, place the rings in liquid nitrogen prior to launching them.  If this is desired, please specifically request liquid nitrogen. 

Tutorial: Set-up Instructions for E&M: Ind - 10
Transcript:

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