Inclination or Dip
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-309
2025-11-29
14
In Fig. 1 we see that in every position but one the needle dips toward one of the poles. In a similar way a needle that has been balanced horizontally on a pivot, and then magnetized, will not remain horizontal, but will dip toward the nearer pole of the earth. The angle of dip, that is, the angle the needle makes with a horizontal line, increases as the distance from the magnetic equator increases. At the magnetic equator there is no dip, while at the magnetic poles the needle will place itself in a vertical direction.
FIG.1
The true pole is beneath the surface. The needle, except at the apparent pole itself, does not point directly toward the true pole, but instead lies tangent to a curved line of force, such as one of those shown in Fig. 2.
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