The compass is kept at the place where directions are to be known. The needle comes to rest in the north-south direction. The compass box is then gently rotated until the north and south marked on the dial align with the needle, indicating all directions at that place.
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दृव्य के संरक्षण का नियम अथवा दृव्य किअविनासिता का नियम
A magnetic compass determines directions by using a magnetized needle that aligns itself with the Earth’s magnetic field. The needle’s north end points towards the magnetic north pole. By observing the needle’s direction, users can orient themselves and determine cardinal directions (north, south, east, west), aiding in navigation and map reading.