Question

(a) What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined ?

(b) Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.

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Answer 1

(a) A magnetic field line is the path along which a free north-pole tends to move. The direction of a magnetic field at a point is determined by placing a small compass needle. The N - pole of compass indicates the direction of magnetic field at that point.

hope it helps u

Answer 2

Answer:

Explanation:

(a)Magnetic field lines are a visual tool used to represent magnetic fields. They describe the direction of the magnetic force on a north monopole at any given position.

(b)magnetic field lines is very useful in visualizing the strength and direction of the magnetic field . The direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points.