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Question

For the terrestrial magnetism establish a relation between angle of dip θ, horizontal component H and vertical component V.

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Solution

Let I be the total intensity of earths field and θ be the angle of dip.
Resolving I in two perpendicular direction we get Horizontal component =Icosθ and vertical component =Isinθ
or H=Icosθ ....(i)
and V=Isinθ .....(ii)
Dividing equation (ii) by equation (i) we get
VH=IsinθIcosθ
VH=tanθ .....(iii)
or tanθ=VH

666146_628507_ans_6126b25fc7d74eb9979bba6df3f543bb.png

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