Question

Define angle of dip. Find the value of dip angle at any point for which the horizontal component and vertical component of earth's magnetic field are equal.

Answer 1

The angle of dip is the angle between the direction of the earth's magnetic field and the plane of the horizon

Horizontal component of earth's magnetic field=$B_H=Bcos\theta$

Vertical component of earth's magnetic field=$B_V=Bsin\theta$

Now, $Bcos\theta =Bsin\theta$

$⟹\theta ={45}^{\circ }$