how does a magnetic compass help to identify directions?
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Compasses are mainly used in navigation to find direction on the earth. This works because the Earth itself has a magnetic field which is similar to that of a bar magnet (see the picture below). The compass needle aligns with the Earth's magnetic field direction and points north-south.
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As we know that the freely suspended magnet always stop at the direction of north so needle magnet of compass is always stop at north direction
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