At which place, earth's magnetism become horizontal
Text Solution
Verified by ExpertsThe correct answer is:
D
The plane perpendicular to the magnetic axis of earth and passing through the points when the magnetic needle is parallel (i.e. horizontal) to the earth's surface intersects the earth's spherical surface into a circle. This circle is called the magnetic equator of earth. At magnetic equator, angle of dip, 
, hence at magnetic equator, magnetic field lines become horizontal.
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