Q】write about magnetic compass construction and its working.
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magnetic compass is a simple device used for finding direction. It consists of a magnetic needle that can turn freely about its centre. The needle is encased in a box with a transparent top. Directions are either printed on a card placed below the needle or marked on top of the box.
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A magnetic rod is required when constructing a compass. ... For example, a magnetised rod can be created by repeatedly rubbing an iron rod with a magnetic lodestone. This magnetised rod (or magnetic needle) is then placed on a low friction surface to allow it to freely pivot to align itself with the magnetic field.
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