Once a current is flowing through the coil, it can interact with a magnet. Either hold the magnet close to the coil, or tape it to the battery right underneath the coil. The closer the magnet is to the coil the stronger it will interact. See what happens when you spin the coil. Depending on the direction the current is flowing and the side of the magnet that is interacting with the coil, the coil may continue to spin or may not. If the coil does not keep spinning, try spinning the other direction. Different variations will give you different results. The coil may spin faster, slower, or not at all if you change something. Try moving the magnet closer to or further from the coil, pick a stronger or weaker magnet, or use the other side of the magnet. These variations are a fun way to understand the forces in an electric motor.

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Write a summary of the previous text in Chinese:
将磁铁放在靠近线圈的位置。 转动线圈。 尝试不同方法。