{"id":58154,"date":"2026-01-01T05:41:18","date_gmt":"2025-12-31T20:41:18","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=58154"},"modified":"2026-01-01T05:41:18","modified_gmt":"2025-12-31T20:41:18","slug":"knock-over-a-coin-without-touching-it-and-make-aluminum-foil-float-have-fun-with-eddy-current-experiments-at-home-faraday-desk","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=58154&lang=en","title":{"rendered":"Knock Over a Coin Without Touching It\u2014And Make Aluminum Foil Float!? Have Fun with Eddy Current Experiments at Home! (Faraday Desk)"},"content":{"rendered":"

I am Ken Kuwako, your Science Trainer. Every day is an experiment!<\/strong><\/span><\/p>\n

“I wish I could move objects without touching them, just like a superpower…” Believe it or not, you can make that wish come true right now using the power of science! Watch as aluminum foil\u2014which shouldn’t react to magnets\u2014floats into the air, or a high-speed spinning top stops dead as if it hit an invisible wall. Behind these wonders lies the work of Eddy Currents<\/strong>, a phenomenon that acts almost like a transparent ghost of electricity. Today, I will introduce several experiments where you can experience this mysterious “invisible force” using everyday items.<\/p>\n

Moving Coins Without Touching Them<\/h3>\n

Let\u2019s start with an experiment that looks like a magic trick. All you need are coins made of aluminum or copper (like a Japanese 1-yen or 10-yen coin) and a strong magnet. Normally, aluminum and copper are not attracted to magnets. However, try bringing the magnet close to the coin and then pulling it away suddenly. The coin will tip over as if it is being pulled by the magnet! Why does metal move when it isn’t supposed to react to magnetism at all?<\/p>\n

\"\"<\/p>\n