This video shows how a magnet moving near a conductor temporarily brings about an opposing magnetic field in a conductor. A stationary magnet is attracted to elemental metals such as nickel, iron and cobalt but is not attracted to aluminum. However we see in this demo that when the magnetic sphere rolls down the aluminum rail, its movement temporarily brings about an opposing magnetic field in the aluminum underneath it, which in turn, causes it to move down the ramp more slowly.
Learn more about this interesting magnetic effect by googling Lenz's Law.
Ryan Heavy 2014, Shelby Ubriaco 2014, Sheryssa Dodard 2014
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