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Electric Charges And Fields

Question

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

30^o

75^o

60^o

45^o

Solution

45^o

Given:- Horizantol and vertical components of the earth's magnetic field are equal.

B_H = B_v

tanδ = $\frac{B_{v}}{B_{H}}$

= $\frac{B_{H}}{B_{H}}$

tanδ = 1

∴ δ = 45^o ( tan45^o = 1 )