A) Magnetic pole
B) Geographical pole
C) Magnetic meridian
D) Magnetic equator
Correct Answer: D
Solution :
The magnetic equator (or aclinic line) is the line that joins points of zero inclination. When angle of magnetic dip is zero then magnetic field of earth becomes horizontal, because magnetic dip is the angle between the direction of total intensity of magnetic field of earth and horizontal line in the magnetic meridian. Hence, earth's magnetic field becomes horizontal at magnetic equator.
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