The magnetic field of earth is due to
A. induction effect of the sun
B. the presence of a large magnet at the centre of the earth
C. interaction of cosmic rays with the current of earth
D. motion and distribution of some material in an outside the earth
Answer:D
The magnetic field of earth is due to
A. induction effect of the sun B. the presence of a large magnet at the centre of the earth C. interaction of cosmic rays with the current of earth D. motion and distribution of some material in an outside the earth