The magnetic field of earth due to
Motion and distribution of some material in and outside the earth
Interaction of cosmic rays with the current of earth
A magnetic dipole buried at the centre of the earth
Induction effect of the sun
As we learn
Earth's Magnetism -
The branch of Physics which deals with the study of Earth's magnetic field called Terrestrial magnetism.
- wherein
It is also known as geomagnetism.
Theory of earth's magnetism
Study 40% syllabus and score up to 100% marks in JEE