(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Consider the Earth’s magnetic field as that of a dipole with the magnetic field around the equator having magnitude 30 µT. The radius of the earth is 6.37 106 m.

a. Calculate the magnetic flux φB in low earth orbit (r=6.5x10^6 m) at the equator, in units of Tm2.

b. Suppose the field (for some reason) suddenly reverses direction. What is the magnitude of the change of φB?

2. Relevant equations

flux = integral(B dA)

3. The attempt at a solution

The flux in low earth orbit at the equator: I think this means the flux through the area of the ring surrounding the Earth from the surface up to r=6.5x10^6 m. The flux would then be the area of that ring times the given magnetic field, I think?

Then the flux, if the field reverses, is just going to be negative/opposite of whatever the last answer was, right? I do not know if I'm doing this wrong or not :X

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# If earth's poles are reversed suddenly

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