A) induction of Sun's magnetism.
B) current produced by the movement of molten metals.
C) sea current.
D) revolution of the Earth round the Sun.
Correct Answer: B
Solution :
Option [b] is correct. Explanation: The Earth crust is solid, the core of the Earth is surrounded by a mixture of molten iron and nickle. The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the Earth rotates.
You need to login to perform this action.
You will be redirected in
3 sec
