He Will Be A Powerful Magnet Is In A Copper Pipe, But The Result Is Unexpected!

Scientific principles: cross-section of the copper tube is thicker, as magnets fall when may produce currents for copper tubes, but the resulting current generates a magnetic field, hold the magnet in rapid decline, which is physical often say that the theorem of Lenz. If the copper pipe of infinite, in theory, will be close to uniform. Wang felt doing experimental magnet, after buying a little more, maybe which experiments will use to do, haha!