NEET Physics Earth's Magnetism MCQ Question
At a certain location on the Earth's surface, the angle of dip is measured to be 60°. If the horizontal component of Earth's magnetic field at this location is 0.25 G, what is the magnitude of the total magnetic field B_E at this point?
0.50 G
0.43 G
0.29 G
0.25 G
Correct Answer
Detailed Explanation
The angle of dip is the angle that the total magnetic field B_E makes with the horizontal. Using trigonometry, B_E = B_H / cos(dip angle). Substituting B_H = 0.25 G and dip angle = 60°, we get B_E = 0.25 G / cos(60°) = 0.50 G.
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