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Question

The value of the angle of dip is zero at the magnetic equator because on it:


A

V and H are equal

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B

V and H are zero

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C

V is zero

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D

V is infinity

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Solution

The correct option is C

V is zero


The explanation for the correct option:

In the case of option C,

At the equator, the total magnetic field is parallel to the surface of the Earth, that is, horizontal (H) and V is the vertical component and it is zero. δ is the angle of dip.

Then,

tanδ=VHtanδ=0δ=0

Why is the angle of dip zero at equator? - Quora

Hence, the magnetic equator has zero angles of dip because V is 0 there.

The explanation for the incorrect options:

In the case of option A,

Because V is zero and H is parallel to the magnetic field near the equator, hence V and H are not equal.

In the case of option B,

V is zero, but H isn't because it's perpendicular to the magnetic field.

In the case of option D,

V is not infinity, it is zero.

Hence, the correct option is : (C) V is zero.


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