At a point A on the earth's surface...
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At a point A on the earth's surface, the angle of dip, 8=+250. At a point B on the earth's surface, the angle of dip is 8=-250. We can interpret that: (1) A and B are both located in the southern hemisphere. (2) A and B are both located in the northern hemisphere. (3) A is located in the southern hemisphere and B is located in the northern hemisphere. . (4.) A is located in the northern hemisphere and B is located in the southern hemisphere.

JEE/Engineering Exams
Physics
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answer : point ( A ) is located in the Northern hemisphere and point ( B ) is located in the southern hemisphere. explanation : basically, angle ofdipis 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, angle of dip is ( +25^{circ} ) (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^{circ} ) (i.e., negative) so, point ( mathrm{B} ) is located in he southern hemisphere.
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