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Questions  

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

a
A  and B are both located in the southern hemisphere.
b
A  and B are both located in the northern hemisphere.
c
A is located in the southern hemisphere and B is located in the northern hemisphere.
d
A is located in the northern hemisphere and B is located in the southern hemisphere.

detailed solution

Correct option is D

At a point A, the angle of dip is positive and the earth's magnetic north pole is in northern hemisphere. So, point A is located in the northern hemisphere and B is located in the southern hemisphere.

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The values of the apparent angles of dip in two planes at right angles to each other are 30o and 45o. Then the true value of the angle of dip at the place is 


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