Target Exam

CUET

Subject

Physics

Chapter

Magnetism and Matter

Question:

The magnetic field of earth is due to:

Options:

induction effect of the sun

the presence of a large magnet at the centre of the earth

interaction of cosmic rays with the current of earth

motion and distribution of some material in an outside the earth

Correct Answer:

motion and distribution of some material in an outside the earth

Explanation:
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.