Question

what is the reason for earth's magnetic field

Answer 1

From the process of the differentiation,the heavy metals ie, iron and nickel sank to bottom
creating the magnetic field.

Answer 2

Earth’s magnetic field is caused by a dynamo effect.

The effect works in the same way as a dynamo light on a bicycle. Magnets in the dynamo start spinning when the bicycle is pedalled, creating an electric current. The electricity is then used to turn on the light.


hope it helped u....