Magnetic circuit changes the type of attitude by the magnetic field lines various as shown in the figure below.
In the case of a single magnet
 | It is assumed to be directed to the S pole out of the N-pole magnetic field lines. If there is a ferromagnetic material such as iron and magnet close, it will be the attitude of the magnetic field lines shown on the left. |
If there is a ferromagnetic material in the vicinity of the magnet
 | If there is a ferromagnetic material such as iron and magnet close, the balance will collapse the magnetic field lines of many faces there. |
When combined facing the different poles of the two magnets (adsorption)
 | Distance enough to attract the N and S poles of the two magnets is brought close to the magnetic field lines are directed straight to the different poles on the facing. The improved fuel efficiency, such as the magnetization and water, by sandwiching the pipe in this way seem to be many. |
When combined oriented in the same poles of two magnets (Rebound)
 | Distance enough to repel the N and S poles of the two magnets brought close to, the magnetic field lines then turn sharply hit in the center part of the distance. The improved fuel efficiency, such as magnetization water, It is sometimes useful to both sides of the pipe in this way. |
If you are connected by a face-to-face iron rear side different poles of two magnets
 | Than in the case of only tailored towards the magnet, the magnetic field lines is increased leakage flux is small. It is one of the typical methods of so-called closed circuit. |
In the case of cap magnet
 | Since the magnetic field lines are concentrated between the magnet surface facing the top of the figure on the left, and a portion of the iron of the outer periphery, the attractive force will be 3-4 times higher than the case of the magnet simple substance is brought into contact yoke (iron) . However, the lines of magnetic force does not grow far, you need to be careful to not open the gap between the adsorption object. Mainly adsorption for use is (adhesion). |
When combined facing segment type magnet
 | It is not as much the center so close towards the opposite polarity magnetic field lines. It is not well suited for both sides of the pipe with improved fuel efficiency, such as magnetization water. The primary use of segment types are motors and generators. |
Magnetic circuit of the other
 | Various There are other closed circuit using (iron) York.On the assumption that the magnetic field lines toward the S pole from the N pole, please consider a magnetic circuit that utilizes effectively yoke (iron) basically. |