What happens when you randomly move the bar magnet roundabout and above the compass one foot or farther? Nearer than a foot?
- The strength of the magnetic field decreases as the distance increases. In fact, the strength of a magnet will all but disappear as it moves just a small distance away from the compass. Stronger magnets can, however, tend to influence the direction of the compass needle from further distances.
Why?
- This is because the bar magnets interacted with the Earth's own magnetic field, which forces the tip of the compass needle to the north. As you scooted each bar magnet slowly closer to the compass, the magnet field began to take over, pulling the needle slightly from the north. When you linked several bar magnets together, you produced a large super magnet with the strength of all the smaller magnet fields.
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