Question

171.
8. At a point A on the earth's surface the angle of
dip, 8 = +25°. At a point B on the earth's surface
the angle of dip, = -25'. We can interpret
that:
(1) A is located in the northern hemisphere and
B is located in the southern hemisphere.
(2)A and B are both located in the southern
hemisphe
(3)A and B are both located in the northern
hemisphere.
(4)A is located in the southern hemisphere and
B is located in the northern hemisphere.​

Answer 1

Answer:

(Option 1) A is located in the northern hemisphere and B is located in the southern hemisphere.

Explanation:

✽  Dip is the angle that the intensity of earth's magnetic field makes with the horizontal at a place. It is represented by symbol δ.

✽  Angle of dip is 0° at the magnetic equator and 90° at magnetic poles of earth.

✽  Angle of dip will have more value at northern hemisphere than at southern hemisphere.

✽  In the north magnetic pole, the angle of dip is considered as positive dip ( + ) where the range of dip is +90°. At a point, the positive values of dip indicate that the earth's magnetic field is pointing downward.

✽  In south magnetic pole, the angle of dip is considered as negative dip ( - ) where the range of dip is -90°. At a point, the negative values of dip indicate that the earth's magnetic field is pointing upward.

Now, as per the given question.

At a point A on earth's surface, the angle of dip is +25. Here, the angle of dip (i.e., +25) is a positive dip. Therefore, A is located in the northern hemisphere.

At a point B on the earth's surface, the angle of dip is -25. Here, the angle of dip (i.e., -25) is a negative dip. Therefore, B is located in the southern hemisphere.