electromagnetic experiment permanent pen magnetic suspension scientific experiment suit scientific and educational toy diy puzzle technology small production

Product Name: Evermoving Pen

Item No.:KX511

Package: Packaging bag

Product dimensions: 7*1.35 cm

Number of boxes: 400 pCS

Box dimensions: 60*40*55 CM

Magnet is an object that can attract iron and generate a magnetic field around it. In ancient times, people understood magnetism through natural magnets, which are typically magnetized iron ore found in nature and can attract iron objects. The Greek term for "magnet" means "stone from Magnesia"; the suspended natural magnet was the early compass. The earliest documented references to magnets and their properties date back 2,500 years, found in texts from Greece, India, and China. The Roman writer Pliny the Elder already described natural magnets and their ability to absorb iron in his "Natural History" [5]. Chinese texts mention natural magnets attracting iron to create magnets, as recorded in "Guanzi" [6], "Lüshi Chunqiu" [7], and "Huainan Zhi" [8], referring to them as "ci stone".
The magnetic pole pointing north is called the North Pole or N pole, while the magnetic pole pointing south is called the South Pole or S pole. (If the Earth is considered a large magnet, currently the geomagnetic North Pole is the S pole, and the geomagnetic South Pole is the N pole.) Opposite poles of a magnet attract, while like poles repel. The South Pole attracts the North Pole, the South Poles repel each other, and the North Poles repel each other.
Magnets are divided into natural magnets and non-magnetic ones. Natural magnets are also known as natural magnets, and magnets can also be manufactured artificially (strong magnets are neodymium magnets). Non-magnetic magnets only exhibit magnetism under certain conditions; they are usually produced in the form of electromagnets, which utilize electric current to enhance their magnetic field.
The magnetic molecules within an unmagnetized magnet (molecular magnet theory) are arranged in an irregular pattern, but after magnetization, the molecules arrange themselves in a regular structure. At this point, the N and S poles of the magnetic molecules align in the same direction, giving the magnet its magnetism and turning it into a magnet. Additionally, a single magnet possesses opposite poles with equal magnetic strength.
Experimental Objective: 1. The magnetic induction intensity of the main magnetic field lines (also known as the B field, denoted by B) is a vector field. The B field at a point in space is determined by the following two properties:
Direction: The direction pointed in the same way as the north pole indicated by a compass.
Size (also known as intensity): It is directly proportional to the degree to which the compass is affected by the B field.
In the International System of Units, the unit for field B is Tesla, abbreviated as T
2. Magnetic Moment The magnetic moment is a vector that describes the overall magnetic properties of a magnet. The direction of a magnet’s magnetic moment runs from its south pole toward its north pole [1]. Its magnitude is proportional to the strength and length of the magnet. The unit of magnetic moment in international standards is A·m². The magnetic moment includes magnetic dipole moment, magnetic quadrupole moment, etc.; among these, the magnetic dipole moment is commonly used and is denoted by μ.
Experimental Cognition:
Magnet: Main component of magnetics
Main body of the perpetual pen: Support components
Experimental steps: Preparation for the experiment - Identify experimental equipment: the main body of the perpetual pen, magnet
Experiment Report:
Air resistance, (in English: air resistance), is the component force created by the air acting in the direction of rotation when a rotating pen moves through an air medium. Air resistance is proportional to the square of the rotational speed.
Friction resistance, also known as surface resistance, is a type of resistance that occurs when the body moves forward in water, and the water around the body flows in the opposite direction of the body's movement along its surface contours.