Question

Write any two questions to understand the magnetic field lines are closed lines​

Answer 1

Explanation:

Yes, magnetic field lines are closed curves as they extend from a body of a magnet from north pole to south pole outside the body of the magnet and from south pole to north pole inside the body of the magnet . Yes, magnetic field lines are closed as there pass through the magnet or magnetic substance

Answer 2

Magnetic lines

Explanation:

The general direction for the magnetic flow is from the North (N) to the South (S) pole. The magnetic lines form closed loops that leave at the north pole of the magnet and enter at the south pole. Magnetic poles are always in pairs. The field direction is taken to be outward from the North pole and in to the South pole of the magnet. Please find the attached picture where direction is marked with arrow.

Questions to ask to find the magnetic lines are closed loops are:

1. Where does the magnetic flow start and end in a magnet?
2. Are the magnetic lines broken anywhere between the poles?