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Which of the following is the definition for magnetic meridian of Earth?

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Which of the following is the definition for magnetic meridian of Earth?

(a) Vertical plane passing through the axis of a freely suspended or pivoted magnet

(b) Horizontal plane passing through the axis of a freely suspended or pivoted magnet

(c) Vertical plane passing through the geographical North Pole and South Pole at a given place

(d) Horizontal plane passing through the geographical North Pole and South Pole at a given place

I got this question during an online exam.

This key question is from Earth’s Magnetism in portion Magnetism and Matter of Physics – Class 12

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Correct answer is (a) Vertical plane passing through the axis of a freely suspended or pivoted magnet

Best explanation: A vertical plane passing through the axis of a freely suspended or pivoted magnet is known as magnetic meridian of Earth. The vertical plane passing through the geographical North Pole and South Pole at a given place is known as the geographical meridian of that place.

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