Question

Consider the plane S formed by the dipole axis and the axis of earth. If P be the point of intersection of the geographical and magnetic equators then the declination and dip angle at point P are.

• A. $0^o,{11.3}^o$
• B. ${11.3}^o,0^o$
• C. ${11.3}^o,{11.3}^o$
• D. $0^o,0^o$

Answer 1

The correct option is B ${11.3}^o,0^o$

Let point $P$ is in the plane, $S$ needle is in north, so the declination is zero.

Refer image.

From figure,

For point $P$ : Since point $P$ lies in plane $S$ formed by the dipole axis and the axis of the Earth, declination is zero.

For point $Q$ : Since point $Q$ lies on the magnetic equator,angle of dip is zero. Thus the angle of declination is ${11.3}^0$