NEET Physics Earth's Magnetism MCQ Question
A magnetic needle is perfectly balanced on a horizontal axis at a location where the angle of dip is 35° and the Earth's magnetic field is 0.39 G. What is the vertical component of the Earth's magnetic field at this location?
0.22 G
0.39 G
0.32 G
0.28 G
Correct Answer
Detailed Explanation
The vertical component of the Earth's magnetic field can be calculated using Bv = B * sin(dip angle). Given B = 0.39 G and dip angle = 35°, the vertical component Bv = 0.39 * sin(35°) ≈ 0.22 G.
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