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What is the orientation of the Earth’s magnetic axis with respect to its spin axis?

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What is the orientation of the Earth’s magnetic axis with respect to its spin axis?

(a) 2°

(b) 0°

(c) 11°

(d) 24°

I had been asked this question during an online exam.

Asked question is from Vertical & Heading References topic in chapter Air Data Systems, Altitude and Heading Reference of Avionics

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Right answer is (c) 11°

The explanation is: The Earth’s magnetic field is produced by a bar magnet oriented 11°away from the spin axis and passing within a hundred kilometers of its center.

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