Draw a diagram to show the magnetic field lines around a bar magnet

Where do the manufacturers use a magnetic strip in the refrigerator? Why is this magnetic strip used?

Fill in the following blanks with suitable words :

(a) Magnetic field lines leave the..........pole of a bar magnet and enter at its........pole.

(b) The earth's magnetic field is rather like that of a ......... magnet with its........pole in the northern hemisphere.

What is a magnetic field? How can the direction of magnetic field lines at a place be determined?

Explain why, two magnetic field lines do not intersect each other.