Instruction
All materials capable of magnetization are divided into magnetically hard and magnetic. The difference between them is that magnetic materials quickly lose their magnetic properties, while magnetically solid retains them long enough.
It is enough to spend several times with an iron bar for a strong magnet so that he himself is magnetized. If you quickly open and close the iron scissors several times, they will start attracting needles or iron sawdust. This effect can be used if the needle fell into a narrow slit, and a permanent magnet to get it, there is no one.
A permanent magnet made by magnetization of an ordinary, retains its properties for long. It is enough to hit them about a solid surface or heat up to 60 degrees so that it is demaging again.
Various additives to the gland transforming it into steel can strongly change its magnetic properties. Steel capable of quenching is a magnetically hard matter and can be the basis for a strong magnet. From the hardened steel are made of files, canvas of hacksaws, etc. Stainless steel from which kitchen utensils and cutlery are made, it is not amenable to quench or magnetization.
In industry, powerful electromagnets are used everywhere. Their design is much more complicated than that of permanent magnets. To create a powerful electromagnet, a coil is required, consisting of a winding from a copper wire, as well as an iron core. The force in this case depends only on the strength of the current spent through the coils, as well as the number of turns of the wire on the winding. It should be noted that with a certain strength of the current, the magnetization of the iron core is saturated. Therefore, the most powerful industrial magnets are made without it. Instead, some more wires are added. In most of the most powerful industrial magnets with an iron number of turns of the wire rarely exceeds ten per meter, and the current strength used is two amps.
Magnetic fieldThe permeating space does not always have a linear structure and depends on the distance to its source. To reduce magnetic fieldJust move away from its source. If you need to reduce the magnetic fieldgenerated by conductor with current, solenoid or inductance coil, for this change their characteristics.
You will need
- permanent magnet, conductor, solenoid, inductor inductor.
Instruction
Reducing the magnetic field of permanent magnetiposcolk field It is impossible to constantly, simply move it by removing from the point where the measurement is performed. This dependence is directly proportional - the further magnet from the desired point, the weaker it is magnetic field.
Reducing the magnetic field of the direct Conductor suspension Explorer to the current source. In order to reduce magnetic fieldthat surrounds it, you can delete the conductor from the desired space point. The magnetic field action will decrease in so many times, the distance to the conductor will increase. Second way to reduce magnetic field - reduce current strength in the explorer. To do this, consistently attach to it. The induction of the magnetic field will decrease in so many times, the current force will decrease. You can combine ways to reduce the magnetic field. For example, to reduce the induction of the magnetic field in 6 times, you can increase the distance to the conductor 2 times and reduce the current strength in it 3 times.
Reducing the magnetic field solenoidamine magnetic field Solenoid attached to the current source can be in several ways: - To reduce the induction of the solenoid magnetic field in N times, decrease the current strength in it in it;
- reduce the number of solenoid turns in n times, and the intensity of its magnetic field will decrease into the same time;
- Increase the length of the solenoid in n times, without changing the number of turns (stretch it as a spring). How many times the length will increase, the magnetic will decrease in so many times field.
Reducing magnetic inductance (electromagnet) to reduce magnetic field Coils with a core, just remove it from this coil. Reduce the number of turns and current flowing through it, according to the same technique as for the solenoid.
Sources:
- how to reduce times
Any permanent can be just on magnetiT, placing it in a certain way in the external magnetnumber field. Energy gain magnetoS occurs due to an increase in the current of the winding or the number of its turns.
