# 1. What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined?

1. What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined?
2. 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.
3. List any three properties of magnetic field lines.

1.Magnetic field is the space around the magnet where its influence can be detected. Magnetic field lines are closed continuous curves which depict the magnetic field of a magnet. Outside of a magnet, they are directed from North Pole to South Pole of the magnet.

The direction of magnetic field at a point is determined by placing a small magnetic compass at that point. The direction towards which the North Pole of the compass needle points is taken to be the direction of the magnetic field at that point.

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3.Three properties of magnetic field lines are :

• They always travel from North Pole to South Pole outside of a magnet.
• They are closed continuous curves.
• They never intersect each other.