Observe The Magnetic Field of Magnetic Pole
Generally speaking, the magnetic field of a strong magnet is invisible and intangible. This phenomenon also increases the mystery of the magnet and stimulates everyone’s curiosity. If you want to visualize the abstract magnetic field and identify the magnetic poles, you can use a few simple auxiliary tools.
1. Magnetic line of the induction demo board
There are vertical, horizontal, and three-dimensional varieties. Bar magnets and hoof magnets can be used to demonstrate the formation of magnetic lines of induction around and the formation of magnetic lines of induction under different conditions of attraction or repulsion of magnetic poles. It can also demonstrate the formation of magnetic lines of induction in various spaces around the current magnetic field. Generally made of plexiglass, novel, and beautiful, the effect is obvious, both intuitive and can be projected.
a. Shake the demo board gently to make the small needles or small needles in the holes arranged irregularly, and then put the magnet on the demo board and tap the surface of the board to make the small needles or small needles in the hole in the magnetic field Under the action, the magnetic lines of induction are clearly displayed.
b. When used for teaching electric current and magnetic field, when 6-9 power supplies are connected, magnetic lines of induction appear obviously in the needles or small needles in the holes that are arranged irregularly. If you change the direction of the current, the same effect can be obtained, which leads to the conclusion that there is a magnetic field around the energized conductor.
2. Magnetic graphics card
It is also a simple device that is more reliable for detecting magnetic fields. This unique film suspends tiny nickel particles on a thin layer of viscous material to keep it consistent with the magnetic field. It shows the position of the magnet and the number of poles. Simply place the magnetic graphics card on the magnet, and the magnetic poles will appear as dark areas. The light green area is the magnetic field. Magnetic graphics can help us determine the precise position of the magnetic poles, the number of magnetic poles of the magnet, and it is easier to find the “hidden” magnetic field.
3. Magnetic pole detector
Although magnetic observer cards show the location of the magnetic poles, they do not classify the magnetic poles. If it is important to determine the north or south pole of a magnet, then the tool used is a magnetic pole detector. It is very simple to find the magnetic pole using the magnetic pole detector. Just take out the magnet that needs to be detected. , Touch the top Tan bean of the magnetic pole detector to the surface of the magnet, and the corresponding LED light of S or N will light up. The S light means that the magnetic pole of the contacted magnet is S pole, on the contrary, it is the N pole of the magnet. With the promotion and popularization of scientific application equipment, magnetic graphics cards and magnetic pole detectors have become common tools for daily magnetic pole detection by technology enthusiasts. As shown below: