Let the magnetic field on the earth be modelled

Question:

Let the magnetic field on the earth be modelled by that of a point magnetic dipole at the centre of the earth. The angle of dip at a point on the geographical equator

(a) is always zero

(b) can be zero at specific points

(c) can be positive or negative

(d) is bounded

Solution:

(b) can be zero at specific points

(c) can be positive or negative

(d) is bounded

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