Välisväljade

Välisväljade, also known as external fields, refer to the magnetic fields that exist outside of a magnet or an electromagnet. These fields are created by the movement of electric charges within the magnet or electromagnet, and they can exert forces on other magnets or magnetic materials. The strength of välisväljade is typically measured in units of magnetic flux density, such as teslas or gauss.

Välisväljade have a wide range of applications in various fields, including physics, engineering, and medicine. In physics, they are used to study the behavior of magnetic materials and the fundamental properties of electromagnetism. In engineering, välisväljade are utilized in the design of magnetic systems, such as motors, generators, and magnetic levitation devices. In medicine, they are employed in magnetic resonance imaging (MRI) machines, which use välisväljade to generate detailed images of the body's internal structures.

The behavior of välisväljade is governed by the principles of electromagnetism, as described by Maxwell's equations. These equations relate the electric and magnetic fields to their sources, such as electric charges and currents, and they provide a mathematical framework for understanding and predicting the behavior of välisväljade in various situations.