A bar magnet is suspended so it is free to rotate. When you hold a second bar magnet near the suspended magnet, the suspended magnet begins to rotate. What do you have to do to keep the suspended magnet rotating?
Answer & Explanation
The suspended bar magnet always aligns its atoms with the earth's magnetic field, but when we bring closer another magnet, the suspended bar magnet align its atom with the magnet's magnetic field and starts to rotate. This happens because the magnet's magnetic field is greater than the Earth's magnetic field.
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