The angle between the Earth's magnetic axis and the Earth's geographical axis is approximately $... ^\circ$.

$A$ dip circle is at a right angle to the magnetic meridian. What will be the apparent dip in degrees?

At a certain location in Africa,a compass points $12^{\circ}$ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points $60^{\circ}$ above the horizontal. The horizontal component of the earth's field is measured to be $0.16 \; G$. Specify the direction and magnitude of the earth's field at the location.

Assertion: If a compass needle is kept at the magnetic north pole of the Earth,the compass needle may stay in any direction.
Reason: $A$ dip needle will stay vertical at the north pole of the Earth.

Define the angle of dip and the angle of declination.

In India,the magnetic declination at Delhi is . . . . . . .