Question

The angle of dip at the equator is equal to

​​​​​​​$[$0.77 Mark$]$

• A. Zero
• B. ${90}^{\circ }$
• C. ${45}^{\circ }$
• D. ${30}^{\circ }$

Answer 1

The correct option is A Zero

Angle of dip $\left(\text{I}\right)$ can be found using the formula,

$\tan \text{I}=\frac{B_V}{B_H}$

Where,
$B_V$ - Vertical component of Earth's magnetic field
$B_H$ - Horizontal component of Earth's magnetic field.

At the equator, the vertical component of Earth’s magnetic field is zero $i.e{B}_V=0$

So, $\tan \text{I}=0\Rightarrow \text{I}=0^{\circ }$