A man is riding his 4-wheeler at 60 km/hr. If he is riding it constantly at this rate for 1.5 hours, how far did he ride?
1 answer:
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Answer:
Explanation:
The magnetic dipole moment of a circular coil with a current is given by
where
I is the current in the coil
is the area enclosed by the coil, where
is the radius of the coil
So the magnetic dipole moment can be rewritten as
(1)
Here we can assume that the magnetic dipole moment of Earth is produced by charges flowing in Earth’s molten outer core, so by a current flowing in a circular path of radius
Here we also know that the Earth's magnetic dipole moment is
Therefore, we can re-arrange eq (1) to find the current that the charges produced: