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
Correct options are B) , C) and D) Magnetic equator crosses geographical equator and at those points angle of dip will be zero. Geographical equator lying in magnetic north of the the magnetic equator will have BV vertically upwards, therefore, angle of dip will be negative while Geographical equator lying in magnetic south of the the magnetic equator will have BV vertically downwards, therefore, angle of dip will be positive. and maximum and minimum values of BV will be at the points which are at maximum north and maximum south of the magnetic equator. therefore angle of dip is also bounded
