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The magnetic field of earth extends to nearly five times the radius of the earth. i.e., 5 x (6.4 x 10 3 ) km = 3.2 x 10 4 km. where, radius of the earth, r= 6.4 x 10 3

Moving Charges And Magnetism

Question

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What is the approximate distance upto which earth's magnetic field extends?

Answer

The magnetic field of earth extends to nearly five times the radius of the earth.
i.e., 5 x (6.4 x 10³) km = 3.2 x 10⁴ km.

where, radius of the earth, r= 6.4 x 10³