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The source of earth magnetic field is

A. Outer mantle
B. Liquid outer core
C. Lower crust
D. Outer crust

Answer & Solution
Option: B
Explanation :Without the outer core, life on Earth would be very different. Convection of liquid metals in the outer core creates the Earth’s magnetic field. This magnetic field extends outward from the Earth for several thousand kilometers, and creates a protective magnetosphere around the Earth that deflects the Sun’s solar wind.
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