Q5.23Multiple choice
Assume the dipole model for earth’s magnetic field B which is given µ0 2m cos θ by B V = vertical component of magnetic field = 4π r3 µ0 sinθ m BH = Horizontal component of magnetic field = 4π r3 θ = 90° – lattitude as measured from magnetic equator. Find loci of points for which
- (i)B is minimum;
- (ii)dip angle is zero; and
- (iii)dip angle is ± 45°.