Earth's Magnetic Field Component
Horizontal component of Earth's field Bh relates to total B and dip angle δ by?
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About This Question
- Subject
- physics
- Chapter
- magnetic effects and magnetism
- Topic
- earth's magnetic field component
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Bh = B cosδ
- Magnetic Elements: Earth's total field (B) at any point can be resolved into horizontal (Bh) and vertical (Bv) components.
- Angle of Dip ((\delta)): This is the angle made by the total magnetic field vector with the horizontal direction.
- Trigonometry: In the right-angled triangle formed by the components:
- Bh=Bcosδ
- Bv=Bsinδ
- Conclusion: The horizontal component is the projection of the total field onto the horizontal plane, given by Bcosδ.
This medium difficulty physics question is from the chapter magnetic effects and magnetism, covering the topic of earth's magnetic field component. It appeared in the 2025 exam.
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