Advertisement

Space and Physics

What Happens When You Drop A Magnet Through A Copper Tube?

guest author image

Justine Alford

Guest Author

clockMay 13 2014, 15:33 UTC
915 What Happens When You Drop A Magnet Through A Copper Tube?
??, via WIkimedia Commons.

Ahh, Physics, you never cease to astound me. Today’s awesome science demo is brought to you by Lenz’s Law. Heinrich Emil Lenz was a German physicist that formulated a law of electromagnetic induction back in 1833. The most stripped down explanation of the law is that when a current is induced in a conductor, a magnetic field is generated that opposes the action that produces the current.

Advertisement

Check out a demonstration of this in action in the YouTube video below:

In sum: the magnet induced a current in the copper pipe, which in turn produced a magnetic field. The direction of this current then opposed the change in the magnet’s field, resulting in the magnet being repelled and thus falling more slowly. Neat. 


Space and Physics
  • Lenz's law

ABOUT THE AUTHOR