what is compass needle? what it work and what it detect?
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A compass is an instrument which is used to find the direction of a magnetic field. A compass consists of a small metal needle which is magnetised itself and which is free to turn in any direction. ... The compass needle aligns with the Earth's magnetic field direction and points north-south.
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it is a instrument.
A compass needle is a permanent magnet which is suspended so it is free to rotate and align itself with other magnetic fields.
The work of compass needle is to aligns and points toward the top of Earth's magnetic field, giving explorers and lost souls a consistent sense of direction.
It always detect the north.
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