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Can someone help me calculate the current that flows due to the earth's magnetic dipole moment?
The magnitude of magnetic dipole moment of Earth is 8 * 10 ^ 22 J/T. Assume that this is produced by charges flowing in Earth's molten outer core. If the radius of their circular path is 3500 km, calculate the amount of current associated with each moving charge.
2 Answers
- 1 decade agoFavorite Answer
Formula for magnetic moment= (number of turns)(current)(surface area)
Radius in meters = (3500e3 m)
Area of Loop = ((3500e3 m)^2)(pi)
Current = magnetic moment / Area of loop
Current = (8e22)/(((3500e3)^2)(pi))
Current = (2.08e9 A)
