Question

define magnetic field line and write the properties of magnetic field lines​

Answer 1

Answer:

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Explanation:

A magnetic field lines is an imaginary curve along which a free unit north pole tends to move. Magnetic field lines always starts from north pole and end on south pole. The tangent to the magnetic field lines at any point gives the direction of magnetic field at that point.

Answer 2

Answer:

The lines surrounding the bar magnets are called as magnetic field lines

it's properties are:

1. All magnetic field lines are in a closed circular loop
2. All magnetic field lines emerges from north pole and merges in the south pole outside the bar magnet
3. Two magnetic field lines never intersects each other