a magnetic needle free to rotate in a vertical plane, orients itself vertically at a certain place on earth. what are the values of horizontal component of earth's mag field and angle of dip at that place?
Hence, at poles,
As, Horizontal component, H= R cos
And at a place on the magnetic poles, earth's magnetic field is perpendicular to the surface of earth, i.e., vertical.
Therefore, angle of dip () = 900
The angle that a magnetic needle makes with the horizontal plane at any specific location is dip angle.