. What are magnetic field lines. Mention important properties of magnetic field lines

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Ans: Magnetic field lines are the lines drawn in a magnetic field along which north magnetic pole would move.                                                                                                                                   [1]

Properties of the magnetic field lines

i. The magnetic lines start from the north pole of a magnet and end at the south pole

ii. Magnetic lines are closer near the poles

iii. The magnetic lines of force never intersect each other

iv. A magnetic compass, when placed at any of the points on a magnetic line, aligns itself along the tangent to the line of force at that point