Question

The angle of dip at a place where horizontal and vertical components of Earth's magnetic field are equal is

• A. ${45}^o$
• B. ${30}^o$
• C. $0^o$
• D. ${60}^o$
• E. ${90}^o$

Answer 1

Answer: (A)

${45}^o$

The angle of dip is given by $\delta ={\tan }^{-1}\left(B_v/B_h\right)$

where $B_v=$ vertical component of earth's magnetic field and $B_h=$ horizontal components of earth's magnetic field.

Here, $B_v=B_h$

So, $\delta ={\tan }^{-1}\left(1\right)={45}^o$