What is the source of earth’s magnetic field?

Answer and Explanation:

The main source of earth magnetic field is the metals and iron present in earth crust these metals are mainly found in liquid state in earth crust and we know that whenever there is spinning of these liquid metals then there will magnetic field generate, So the main source of earth magnetic field is the metals present in earth crust.

Explained

Explanation:

The core of the Earth is composed of molten metals mostly iron and nickel.  These molten metals are in continuous motion. Thus, generating a very strong current convectional current. This in turn produces magnetic field around Earth. These convectional currents are caused due to heat escaping the earth's core. This magnetic field acts as a barrier against solar wind trying enter the earth's atmosphere.