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At a point A on the earth's surface the angle of dip, $\delta=+25^\circ$. At a point B on the earth's surface the angle of dip, $\delta=-25^\circ$. We can interpret that:
A
A and B are both located in the northern hemisphere.
B
A is located in the southern hemisphere and B is located in the northern hemisphere.
C
A is located in the northern hemisphere and B is located in the southern hemisphere.
D
A and B are both located in the southern hemisphere
Detailed Solution
Angle of dip is the angle made by the earth's resultant magnetic field with the horizontal.
Dip is zero at the equator, positive in the northern hemisphere (field points downward) and negative in the southern hemisphere.
So A ($\delta=+25^\circ$) is in the northern hemisphere and B ($\delta=-25^\circ$) is in the southern hemisphere.