The earth's core is known to contain tron. Yet geologists do not regard this as a source of the earth's magnetism. Why?

The strength of the Earth's magnetic field is

Give the location of earth's magnetic dipole.

The charged currents in the outer conducting regions of the earth's core are thought to be responsible for earth's magnetism. What might be the battery' (i.e., the source of energy) to sustain these currents?

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north up pointing down at 22^@ with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be 0.35 G. Determine the magnitude of the earth's magnetic field at the place.

Where on the earth.s surface is the magnetic dip zero ?

The electrons in the beam of a television tube move horizontally from south to north. The vertical component of the earth's magnetic field points down. The electron is deflected towards

The bounderies of the earth's plate are known as :