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Ring Falling in a Magnetic Field (H 5)


Keyword: Induced Current

Demonstration Description:

A 30 H magnet with poles of about 10 cm. square, is connected to a 12V storage battery. After power is applied an aluminum ring is dropped into the field of the magnet. The ring falls slowly when entering or leaving the field and fast when totally inside the poles. This demonstration illustrates Faraday's and Lenz's Law and is shadow projected. This demo is also shown with a smaller electromagnet, connected to 125VDC, and the TV projection system.


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