A. At the magnetic pole of earth; angle of dip is 90° and B_H = 0.

B. At the magnetic pole of earth; angle of dip is zero and B_v = 0.

C. At the magnetic equator of the earth; angle of dip is 90° and B_H = 0.

D. At the magnetic equator of the earth; angle of dip is zero and B_v = 0.

Choose the correct answer from the options given below:

A and D only

At magnetic equator of Earth, the magnetic field lines become parallel to surface of earth.

∴ Angle of dip = 0°

and B_H = B_net, B_V = 0

At magnetic, poles of earth, the magnetic field lines become perpendicular to surface of earth

∴ Angle of dip = 90°

and B_H = 0, B_V = B_net