Question

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At any place earth's surface having magnetic
latitude lambda if the angle of dip be thita, prove
that (tan thita =2 tan lamda). Assume that earth behaves as a magnetic sphere
​

Answer 1

Explanation:

Br=4πμ0r32Mcosθ

Btheta=4πμ0r32Mcosθ

Since θ=900+λ, thus 

Br=4πμ0r32Mcos(90+λ)=−4πμ0r32Msinλ

Bθ=4πμ0r32Mcos(90+λ)=−4πμ0r32Msinλ

∴tanδ

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