Question

The magnetic field of earth is due to :

• A. Magnetic dipole buried at the centre of the earth
• B. Motion and distribution of some material in and outside the earth.
• C. Induction effect of the sun.
• D. Interaction of gamma rays with the crust of the earth.

Answer 1

Answer: (B)

Motion and distribution of some material in and outside the earth.

The magnetic field of earth is due to motion and distribution of some materials in and outside the earth.

Our planets magnetic field is believed to be generated deep down in earth's core. The Coriolis force, resulting form the earth's spin, also cause swirling whirlpools. The flow of liquid iron generated electric current, which in turn produces magnetic field.

Hence, option : B.