Question

why a compass be used to find east west direction at any place and justify it​

Answer 1

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Why a compass be used to find east west direction at any place and justify it?

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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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