Magnetism and Matter question for NEET / JEE Main, with solution

Answer: (C) $0°$

Concept. The angle of dip is the angle the Earth's total field makes with the horizontal.

Step 1. At the magnetic equator. The field there is horizontal ($B_V = 0$), so a dip needle rests horizontally: $\delta = 0°$. (At the magnetic poles it is $90°$.)

Answer. $0°$ (Option C).

Solution by Sreeraj P, M.Sc Physics