why do we need to align the compass and rotate the apparatus
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Explanation:
The Earth's magnetic field exerts a force on the compass needle, causing it to rotate until it comes to rest in the same horizontal direction as the magnetic field. Over much of the Earth, this direction is roughly true north, which accounts for the compass's importance for navigation
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Answer:
The Earth's magnetic field exerts a force on the compass needle, causing it to rotate until it comes to rest in the same horizontal direction as the magnetic field. Over much of the Earth, this direction is roughly true north, which accounts for the compass's importance for navigation.
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