Describe the construction of a compass.
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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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circular plastic plate which inside is marked with a paper contain the directions of earth a small magnetic needle is fixed at the middle of the plate ensure that the needle was not touching the paper cover the plastic plate with glass plate as box
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