Q.
The angle of dip at a place is 37o and the vertical component of the earths magnetic field is 6×10−5T. The earths magnetic field at this place is (tan37o=3/4)
Given: tan37o=43
The vertical component of the earths magnetic field BV=6×10−5T sin37o=53
For vertical component BV=Bsinθ
Or B=sinθBV
Or B=36×10−5×5
Or B=10×10−5
Or B=10−4T