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

Give information about Earth's magnetism.

Name the elements of the earth's magnetic field.

Which of the following is the ultimate source of energy on the earth ?

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.

Out of aphelion and perihelion, where is the speed of the earth more and why

Tell the proper reason for the earth's magnetic field to occur.