Question

explain in briefly the construction of magetic needle​

Answer 1

Construction of magnetic compassA magnetic compass has a flat circular aluminium box , at the base of which are marked directions like north , south , east and west. A suspended magnetic needle is placed in the center which can rotate freely . The north pole is if different colour to identify the north pole..

Answer 2

Answer:

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.