The horizontal and vertical components of earth's magnetic field at a place are 0.3G and 0.52G. The earth's magnetic field and the angle of dip are

Options

A. `0.3g and delta=30^(@)`
B. `0.4g and delta=40^(@)`
C. `0.5g and delta=50^(@)`
D. `0.6g and delta=60^(@)`

Answer

D

Explanation

Here, `B_(H)=0.3G, B_(V )= 0.52 G`
The earth's magnetic field
`B=sqrt(B_(H)^(2)+B_(V)^(2))=sqrt((0.3)^(2)+(0.52)^(2))=0.6 G`
and angle of dip, `tandelta=(B_(V))/(B_(H))=(0.52)/(0.3)=1.734`
`delta=tan^(-1)(1.734)=60^(@)`