Consider the plane S formed by the dipole axis and the axis of earth. Let P be point on the magnetic equator and in S. Let Q be the point of intersection of the geographical and magnetic equators Obtain the declination and dip angles at P and Q.

Explanation

P is in the plane S, needle is in north so the decination is zero.

P is also on the magnetic equator so the angle of dip=0, bacause the value of angle of dip at equator is zero Q is also on the magnetic equator, thus the angle of dip is zero. As earth titled on its axis by `11.3^ (@)` thus the declination at Q is `11.3^(@)`.