An inductor, also known as a coil, choke or reactor, is a passive electrical component with two connections that stores energy in a magnetic field when electrical current flows through it. The most common form of an inductor is a coil of wire, such as a coil of copper wire around a core of iron or other ferromagnetic material.
When electric current flows through the coil, it creates a magnetic field around the coil. If the current flowing through the coil changes, the magnetic field also changes, inducing an electromotive force (EMF) in the coil. This induced EMF opposes the change in current, which is called self-inductance.
Inductors are widely used in electrical circuits for a variety of purposes. For example, they are commonly used in power supplies to filter out unwanted noise, in radio frequency (RF) circuits to tune circuits to a specific frequency, and in electronic ballasts for fluorescent lights.
The ability to store energy in the magnetic field is measured by the inductance, measured in units of henries (H). The higher the inductance, the more energy the inductor can store in its magnetic field.
In general, inductors are widely used in many different types of electronic circuits and applications due to their ability to store energy in a magnetic field and their ability to oppose changes in current. For example:
Enameled copper wire is a type of insulated wire that is coated with a thin layer of enamel, which is a type of plastic. The enamel layer serves as an insulator, protecting the wire from damage and preventing electrical shorts.
Enameled copper wire is used in a wide range of applications, including:
The enamel coat on this wire is hard, durable, and has good insulation properties which can withstand high currents, making it suitable for many high current applications, such as motors and transformers.