The magnetic field of earth is due to

Magnetic dipole buried at the centre of the earth

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Motion and distribution of some material in and outside the earth

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Induction effect of the sun

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Interaction of cosmic rays with the crust of the earth

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Solution

The correct option is B Motion and distribution of some material in and outside the earth

The Earth's magnetic field is believed to be generated by electric currents in the conductive material of its core, created by convection currents due to heat escaping from the core.The magnetic field of earth is due to motion and distribution of some material in and outside the earth

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