what is a magnetic compass what is it used for.
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Magnetic compass is a device which is used to locate the direction of a place. It always rests in a north-south direction and is very helpful as navigators in ships, submarines, aeroplanes.
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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 that 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. And magnetic compass, in navigation or surveying, an instrument for determining direction on the surface of Earth using a magnetic pointer that aligns itself with Earth's magnetic field.
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