Isogonic lines on a magnetic map will have

What is the most accepted scientific explanation for the origin of the Earth's magnetic field?

What was the early recognition of Earth's magnetic field? State the dynamo effect.

If $\theta_1$ and $\theta_2$ are the apparent angles of dip observed in two vertical planes at right angles to each other,then the true angle of dip $\theta$ is given by:

Planets producing larger magnetic field have larger

At the place where the angle of dip is $60^{\circ}$,what is the relation between the vertical component $Z_{E}$ and the horizontal component $H_{E}$ of the Earth's magnetic field?