Mathematics · Moving Charges and Magnetism
A long straight wire of circular cross-section of radius 'a' carries a steady current distributed uniformly across its cross-section. The ratio of the magnitudes of magnetic fields at distances 0.5a and 1.5a from the axis of the wire is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13:4✓
- 21:2
- 32:3
- 41:1
Correct answer
3:4
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