$A$ compass needle will show which one of the following directions at the Earth's magnetic pole?

Isogonic lines on a magnetic map will have

At a given place on the Earth,the angle between the Magnetic Meridian and the Geographic Meridian is called . . . . . . .

At a point on the surface of the Earth,the value of the horizontal component of the Earth's magnetic field is equal to the value of the vertical component of the Earth's magnetic field. The angle of dip is:

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

The direction of the null points is on the equatorial line of a bar magnet,when the north pole of the magnet is pointing