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प्रश्न
What is the angle of dip at a place where the horizontal component `(B_H)` and vertical component `(B_V)` of earth’s magnetic field are equal :
विकल्प
130°
60°
45°
90°
उत्तर
45°
Angle of dip = `tan δ = B_V/B_H`
`tan δ = B/B`
`δ = 45^circ`
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