The earth's magnetic field

Earth's magnetic field always has a horizontal component expert at or Horizontal component of earth's magnetic field remains zero at

How is the horizontal component of earth's magnetic field related with the total intensity of earth's magnetic field and the angle of dip ?

What are limits of earth's magnetic field?

Define parameters of earth's magnetic field.

The study of earth's magnetic field is called as

The study of earth's magnetic field is called as

Write the value of earth's magnetic field.

The intensity of earth's magnetic field is of the order of