# At a point A on the earth’s surface the angle of dip, δ = +25°. At a point B on the earth’s surface the angle of dip, δ = –25°. We can interpret that: (1) A and B are both located in the northern hemisphere. (2) A is located in the southern hemisphere and B is located in the northern hemisphere. (3) A is located in the northern hemisphere and B is located in the southern hemisphere. (4) A and B are both located in the southern hemisphere

Answer: Point A is located in the Northern hemisphere and point B is located in the southern hemisphere.

Explanation: basically, angle of dip is the angle made by resultant earth's magnetic field from horizontal.

• angle of dip at equator is considered as zero.
• angle of dip in northern hemisphere is considered as positive.
• angle o dip in southern hemisphere is considered as negative.

here, at point A on the earth's surface, the angle of dip is +25° (i.e., positive) so, point A is located in the Northern hemisphere and point B on the earth's surface, angle of dip is -25° (i.e., negative) so, point B is located in the southern hemisphere.

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