what is magnetic field | magnetic field lines

Magnetic Field.

The space surrounding a magnet in which magnetic force is exerted, is called a magnetic field. A compass needle placed near a magnet gets deflected due to the magnetic force exerted by the magnet, and the iron filings also cling to the magnet due to magnetic force. The magnetic field pattern due to a bar magnet. The magnetic field has both, magnitude as well as direction. The direction of magnetic field at a point is the direction of the resultant force acting on a hypothetical north pole placed at that point. The north end of the needle of a compass indicates the direction of magnetic field at a point where it is placed.

Magnetic Field Lines.

A magnetic field is described by drawing the magnetic field lines. When a small north magnetic pole is placed in the magnetic field created by a magnet, it will experience a force. And if the north pole is free, it will move under the influence of magnetic field. The path traced by a north magnetic pole free to move under the influence of a magnetic field is called a magnetic field line. In other words, the magnetic field lines are the lines drawn in a magnetic field along which a north magnetic pole would move. The magnetic field lines are also known as magnetic lines of force. The direction of a magnetic field line at any point gives the direction of the magnetic force on a north pole placed at that point. Since the direction of magnetic field line is the direction of force on a north pole, so the magnetic field lines always begin from the N-pole of a magnet and end on the S-pole of the magnet Inside the magnet, however, the direction of magnetic field lines is from the S-pole of the magnet to the N-pole of the magnet. Thus, the magnetic field lines are closed curves. The magnetic field lines due to a bar magnet . When a small compass is moved along a magnetic field line, the compass needle always sets itself along the line tangential to it. So, a line drawn from the south pole of the compass needle to its north pole indicates the direction of the magnetic field at that point. We will now describe how the magnetic field lines (or magnetic field) produced by a bar magnet can be plotted on paper.

1. To Plot the Magnetic Field Pattern Due to a Bar Magnet by Using Iron Filings Place a card (thick, stiff paper) over a strong bar magnet Sprinkle a thin layer of iron filings over the card with the help of a sprinkler, and then tap the card gently. The iron filings arrange themselves in a regular pattern. This arrangement of iron filings gives us a rough picture of the pattern of magnetic field produced by a bar magnet. This happens as follows: The bar magnet exerts a magnetic field all around it. The iron filings experience the force of magnetic field .

if you like our post pls follow me by email.

Tags = magnetic field,what is magnetic lines,field,magnet,magnetic lines