True Dip and Apparent Dip - Magnetism and Matter Class 12

Here we will study about True Dip and Apparent Dip. Apparent Dip The dip at a place is determined by a dip circle. It consists of a magnetized needle capable of rotation in a vertical plane about a horizontal axis. The needle moves over a vertical scale graduated in degrees. If the plane of the scale of the dip circle is not in the magnetic meridian then the needle will not indicate the correct direction of the earth's magnetic field. The angle made by the needle with the horizontal is called Ap...