Magnetic meridian is an imaginary:

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Q: 50 (NDA-II/2015)
Magnetic meridian is an imaginary:

question_subject: 

Geography

question_exam: 

NDA-II

stats: 

0,8,37,29,3,8,5

keywords: 

{'magnetic meridian': [2, 0, 1, 1], 'horizontal plane': [0, 0, 0, 3], 'vertical plane': [0, 0, 2, 1], 'north': [0, 0, 1, 0], 'south': [15, 1, 23, 37], 'line': [4, 1, 3, 4]}

The correct answer is option 3: vertical plane.

Magnetic meridian is an imaginary vertical plane that contains the magnetic north and south poles. It is used as a reference for measuring magnetic directions and angles.

Option 1, "line along north-south," is incorrect because while the magnetic meridian does run in a north-south direction, it is not just a line but a complete plane.

Option 2, "point," is also incorrect because the magnetic meridian is not a single point, but rather a plane that contains multiple points, namely the magnetic north and south poles.

Option 4, "horizontal plane," is also incorrect because the magnetic meridian is a vertical plane, parallel to the lines of longitude on the Earth`s surface.

So, the magnetic meridian is an imaginary vertical plane that acts as a reference for magnetic directions and is aligned with the magnetic north and south poles.

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