Zoom magnet to scattered on the table iron staples.Located at a distance, the magnet will attract the clip.If after a few minutes you remove the staples from magnet , you will find that they themselves have become a magnet properties .This is due to the existence of a magnetic field.As you can see, increasing the number of staples pulled to the ends of the magnet , that is, to his poles .If you take two magnet and put a magnet on the table, and the second will slowly approaching it, you discover that the poles of the magnets can attract and repel.
Therefore, to determine the plus magnet , you can use another magnet, the polarity of which is determined and marked.Hold the magnets to each other.If they repel each other, then they have the same pole.
order to determine plus magnet can also use the compass - the most famous device, which uses a magnet, and it serves for the determination of the horizon.Magnetic properties endowed with a compass needle.To the north always points to the blue end of the compass, and the south - red.Slowly bring your compass to one side of the magnet after the compass needle is established in the earth's magnetic field.South arrow will point to the north pole of the magnet , and the north arrow - to the south.Thus, you determine where the plus and minus from where magnet .
can define plus magnet another way.To do this, bring a magnet to turn on the TV screen at a time when television, or before the end of the broadcast, is transmitted to the grid settings.If the central part of the grid shift in the opposite direction from the magnet , mean field magnet positive.
You can also hang a magnet because of its central part on a string where no metal objects nearby.South Pole magnet point to the south, and the north - to the north.
- how to define the plus and minus