Which electrical works have strong magnetism

Electricity and magnetism are closely related, as described by Maxwell's equations in electromagnetism. Whenever electric current flows through a conductor, it generates a magnetic field around it. The strength of this magnetic field depends on various factors, including the magnitude of the current and the shape of the conductor. Here are some electrical works or devices that typically have strong magnetism:

1. Electromagnets: Electromagnets are devices designed to produce a strong magnetic field when an electric current is passed through a coil of wire. They are used in various applications, including electric motors, transformers, magnetic locks, and magnetic resonance imaging (MRI) machines.

2. Generators: Electric generators convert mechanical energy into electrical energy through the process of electromagnetic induction. When a coil of wire rotates in a magnetic field, it generates an electric current. Conversely, when an electric current is generated, it creates a magnetic field. The magnets or electromagnets used in generators can produce strong magnetic fields.

3. Transformers: Transformers are devices that use electromagnetic induction to transfer electrical energy between two or more coils of wire. They consist of primary and secondary coils wound around a core made of magnetic material. When alternating current (AC) flows through the primary coil, it creates a magnetic field that induces voltage in the secondary coil. The strength of the magnetic field depends on the current and the properties of the core material.

4. Electric Motors: Electric motors use the interaction between a magnetic field and an electric current to generate mechanical motion. Inside an electric motor, there are typically permanent magnets or electromagnets that create strong magnetic fields, causing the rotor to rotate.

5. MRI Machines: Magnetic Resonance Imaging (MRI) machines use strong magnetic fields and radio waves to create detailed images of the internal structures of the human body. Superconducting magnets are often used in MRI machines to generate extremely powerful magnetic fields.

6. Particle Accelerators: In research and medical facilities, particle accelerators use strong magnetic fields to guide and control the paths of charged particles such as electrons and protons. These magnetic fields are essential for the operation of these machines.

7. Magnetic Levitation (Maglev) Trains: Maglev trains use powerful magnets, often superconducting magnets, to levitate above the tracks and propel themselves forward. The magnetic fields involved can be quite strong.

8. High-Voltage Power Lines: While not intentionally designed to generate magnetic fields, high-voltage power lines carrying substantial electrical currents can produce magnetic fields around them. However, these fields are generally not as strong as those produced by devices specifically designed for magnetic purposes.

It's important to note that while these electrical works and devices can generate strong magnetic fields, they are typically designed and controlled to ensure the safety of operators and nearby individuals, and measures are in place to mitigate potential health risks associated with strong magnetic fields.