Eps 1: magnetism and where you find it
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The particles line up along the lines of force in the Earth's field.
the bright bands of color around the South Pole caused by the solar wind and the Earth's magnetic field.
Students create and observe ferrofluids to understand magnetic field lines and how they can affect planets.
Host
Delores Steeves
Podcast Content
Dividing a permanent magnet into two halves would produce two small magnets, and if the magnetic field surrounding the magnet has two poles, called the north and south poles, it is said to have a north pole and a south pole. The name derives from the fact that magnets are aligned in the direction of the Earth's weak magnetic fields so that they can oscillate freely - a principle on which the directions magnetic compasses find are based. A magnet always has either a north pole or a south pole, but not both at the same time.
The north pole of a magnet takes its name from the fact that it always points to the north of the Earth, the geographical magnet pole.
Magnetism is the force exerted by magnets when they attract and repel each other. The magnetic force is a non-contact force that presses and pulls an object without touching it.
This movement generates an electric current and causes electrons to act like microscopic magnets, causing a change in the object's magnetic field.
If the surrounding magnetic field is strong enough, it is possible to align it so that it contributes to strong magnetic fields in the material (see Figure 1). An equal number of electrons rotate in different directions and cancel each other out, causing their magnetism to be cancelled out. This results in a strong field in one direction and a weak field in the other, with one compensating the other, as shown in Figure 2.
When the surrounding field is removed, creating a permanent magnet, it remains aligned in the same direction as the original magnetic field, but in a different direction.
If something is attracted by a magnet, turn it over and try again, but this time it is repelled by the magnet. The typical magnet you find or use in your home can be constructed from ferromagnetic materials and made from a variety of materials such as iron, copper, nickel, iron oxide and other metals. Being attracted to magnets does not mean that the material is a magnetic material, nor is it a "magnetic material," nor can it be made of magnets. Indeed, an object cannot be a 'magnet', because it must repel the object any time.
The magnetic N Pole of Earth is the magnetic S Pole because it is attracted to the N Pole of a magnet. The north and south poles attract each other by pushing each other away, but the poles are attracted and repelled by the same magnetic field as the south and north poles of Earth.
If you play with magnets, you have probably noticed that they can be used to attract certain materials and objects, but not others. A magnet is surrounded by a field generated by the magnetic field, and the magnet attracts and repels objects in the field. This can all be dangerous, so please read the safety precautions before touching any magnets such as a magnetic board, a ball or even a piece of paper.
The presence of a magnetic field is the reason why a metal refrigerator door can be covered with a magnet, but not vice versa.
If you hold two magnets in such a way that their poles are close together, you will feel a magnetic force. If the poles of each pole in the north - to the north and south - are identical, then one feels the attraction of the magnets, but if they face each other in the north or south, one does not feel that they repel each other. However, if the pole is opposite from north to south and the other from south to north, you will feel its repulsion.
The two opposite poles will attract each other, but the two poles that are equal - the North Pole and the South Pole - will collide.
A small compass in the magnetic field indicates the direction of the force field. An iron file or compass provide a diagram that can be drawn on the magnetic field to represent the forces in it. The iron filings you place in your magnetic fields not only show where the lines of force are, but also show you the directions of each force in that field.
There are many different types of magnetic materials, but you can imagine that the materials used in this class are the ones you use in your class. A magnet is a magnet that is located in an object or device that emits an external magnetic field. Although one might assume that magnets are also used for other things such as electric currents, electric current is caused by a charge beam in the circuit of a magnetic material. In principle, the force is exerted by an electric current at a distance other than the magnet on other magnets.