In addition to the commonly used, you also need to understand these roundmagnet

A round magnet is a type of magnet that is shaped like a cylinder or a disc. It is one of the most common types of magnets used in everyday life. Round magnets are used in a variety of applications, from industrial to consumer products.

Round magnets are made from a variety of materials, including iron, steel, neodymium, and samarium cobalt. The material used to make the magnet determines its strength and magnetic properties. Iron and steel are the most common materials used to make round magnets, as they are relatively inexpensive and have good magnetic properties. Neodymium and samarium cobalt are more expensive materials, but they have higher magnetic properties than iron and steel.

Round magnets are used in a variety of applications, including motors, generators, loudspeakers, and magnetic separators. They are also used in consumer products such as refrigerator magnets, magnetic toys, and magnetic jewelry. Round magnets are also used in medical applications, such as magnetic resonance imaging (MRI) and magnetic therapy.

Round magnets are available in a variety of sizes and shapes. The most common shapes are discs, cylinders, and rings. The size of the magnet depends on the application it is used for. For example, a larger magnet is needed for a motor or generator, while a smaller magnet is needed for a refrigerator magnet.

Round magnets can be magnetized in two ways: by direct current (DC) or alternating current (AC). DC magnetization is the most common method, as it is the simplest and most cost-effective. AC magnetization is more complex and expensive, but it can produce stronger magnetic fields.

Round magnets can be magnetized in two directions: north-south (N-S) or south-north (S-N). N-S magnetization is the most common, as it produces a stronger magnetic field. S-N magnetization produces a weaker magnetic field, but it is more suitable for applications that require a weaker magnetic field.

Round magnets can also be magnetized in two polarities: positive (N) or negative (S). Positive magnetization produces a stronger magnetic field, while negative magnetization produces a weaker magnetic field.

Round magnets are available in a variety of grades, which are determined by their magnetic properties. The higher the grade, the stronger the magnetic field. The most common grades are N35, N42, and N52.

Round magnets are used in a variety of applications, from industrial to consumer products. They are relatively inexpensive and have good magnetic properties, making them a popular choice for many applications.