MHT CET Physics question

Not in JEE Advanced syllabus

Earths magnetisms is due to a

(A)Large solid mass of magnetic material
(B)Strong bar magnet placed inside the earth
(C)Large mass of molten iron at the earths core
(D)Molten charged magnetic fluid giving rise to current inside the core of the earthCorrect

Answer: (D)

Solution

The Earth's magnetism is attributed to electric currents set up by the convective motion of molten charged conducting fluid in the outer core; the core is too hot

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Question ID VK-080477