Question

The horizontal and the vertical components of earth's magnetic field at any place are equal. The angle of dip at that place will be:

• A. $0^o$
• B. ${45}^o$
• C. ${60}^o$
• D. ${90}^o$

Answer 1

The correct option is B ${45}^o$

Let horizontal component of earth's magnetic field is $B_H$ and vertical component is $B_V$.

Angle of dip is $\theta$ then,

$tan\theta =\frac{B_V}{B_H}$

But $B_V=B_H$ is given,

$\therefore tan\theta =\frac{B_V}{B_V}=1$

$\therefore \theta ={45}^o$

Hence angle of dip at that place is ${45}^o$.