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

(N/A) $1$. At point $P$: Since point $P$ lies in the plane $S$ formed by the dipole axis and the Earth's axis,the magnetic meridian coincides with the geographical meridian. Therefore,the declination at $P$ is $0^{\circ}$. Since $P$ lies on the magnetic equator,the angle of dip at $P$ is $0^{\circ}$.
$2$. At point $Q$: Point $Q$ is the intersection of the geographical and magnetic equators. The magnetic axis is tilted at an angle of $11.3^{\circ}$ with respect to the geographical axis. Consequently,the magnetic meridian at $Q$ makes an angle of $11.3^{\circ}$ with the geographical meridian. Therefore,the declination at $Q$ is $11.3^{\circ}$. Since $Q$ lies on the magnetic equator,the angle of dip at $Q$ is $0^{\circ}$.