A) 5
B) 4
C) 3
D) 2
Correct Answer: A
Solution :
: Equator, \[\theta ={{0}^{o}},{{B}_{H}}={{B}_{e}}\cos \theta =5\cos {{0}^{o}}=5\] At poles, \[\theta ={{90}^{o}},V={{B}_{e}}\sin \theta =5\sin {{90}^{o}}=5\] Thus, total intensity of earths magnetic field at poles is also 5 units, but in the vertical direction. At equator, value is the same, but the direction is horizontal.
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