Magnet

 

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets. The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.

The north-seeking pole of such a magnet, or any similar pole, is called a north magnetic pole. The south-seeking pole, or any pole similar to it, is called a south magnetic pole. Unlike poles of different magnets attract each other; while like poles repel each other.

Poles of a Magnet:

A magnet has two poles, viz. North Pole and South Pole. The magnetic power is concentrated on the poles of a magnet. When a bar magnet is suspended to move freely, it always points in the north-south direction. The north pole of the magnet points towards the north and the south pole of the magnet points towards the south.

Interaction Between Poles of Magnet


  1. Like poles repel each other. This means when north pole of a magnet is brought near the north pole of another magnet, both repel each other. The same holds true for the south poles of two magnets.
  2. Unlike poles attract each other. This means when north pole of a magnet is brought near the south pole of another magnet, both attract each other.

Like poles repel and unlike poles attract

  • When we bring close two opposite ends of magnets we can see that they attract each other but when we bring the same ends closer they repel each other. This phenomenon is used by modern technology and it has always puzzled people.
  • Magnetism can explain the reasons behind this strange attraction and repulsion that acts between two poles. The attraction or repulsion force that acts between two magnets or a magnet and a neutral object is called magnetism. A magnet has the power to attract other objects made of nickel, iron, steel and cobalt.  It does so by the magnetic field around it.
  • Every magnet has two poles – North Pole and South Pole. Earth also has its magnetic field and if a magnet is hung from a point to rotate freely , its one end will point towards north and the other towards south. The magnetic force is a result of the electrons that are loose and move freely inside the magnets.
  • At one end of the magnet there is a density of negatively charge ions and at another there is lack of negatively charged ions. When the opposite poles are near each other they attract each other because one of the poles is negatively charged and the other pole is positively charged.
  • Magnetic force is driven to make successful exchange of electrons and bring the poles to a neutral state. The same poles repel each other because they are both negatively or positively charged. The same poles cannot exchange electrons and become neutral. This is why magnets attract neutral objects like iron or nickel towards them.
  • All objects ultimately want to lose thier charge to become stable and neutral.