Planets producing larger magnetic field have larger

Intensity of magnetic field due to earth at a point inside a hollow steel box is

A dip needle lies initially in the magnetic meridian when it shows an angle of dip $\theta $ at a place. The dip circle is rotated through an angle $x$ in the horizontal plane and then it shows an angle of dip $\theta '$. Then $\frac{{\tan \theta '}}{{\tan \theta }}$ is

The angle of dip at the magnetic equator is....$^o$

At the magnetic poles of the earth, a compass needle will be

The angle between the magnetic meridian and geographical meridian is called