電磁石の力に挑戦しよう
導線をコイル状に巻いて電流を流すと電磁石になります。電磁石の磁力はコイルの巻数が多いほど、また流れる電流が多いほど強くなります。電磁石の磁力と力比べをしてみましょう。磁力と電流の関係を体感することができます。
An electromagnet is a magnet that gets its power from the electricity running through its coils. The more coils there are, or the stronger the electrical current flowing through them gets, the stronger the magnetic field is. Here you can try your strength against the strength of an electromagnet, and learn about the connection between magnetism and electricity as you do so.
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