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Question

(B) The magnetic field of the Earth can be modeled as a magnetic dipole.At the magnetic equator,the horizontal component of the Earth's magnetic field

Vedclass · Accepted Answer

$1:2$

Vedclass · Answer

(B) The magnetic field of the Earth can be modeled as a magnetic dipole.At the magnetic equator,the horizontal component of the Earth's magnetic field is $B_e = \frac{\mu_0}{4\pi} \frac{M}{R^3}$.At the magnetic poles,the vertical component of the Earth's magnetic field is $B_p = \frac{\mu_0}{4\pi} \frac{2M}{R^3}$.Therefore,the ratio of the intensity at the equator to the poles is $\frac{B_e}{B_p} = \frac{\frac{\mu_0 M}{4\pi R^3}}{\frac{2\mu_0 M}{4\pi R^3}} = \frac{1}{2}$.Thus,the ratio is $1:2$.

The ratio between the total intensity of the magnetic field at the equator to the poles is:

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