what are resistors made of

Resistors are passive electronic components that are designed to limit the flow of electric current in a circuit. They are commonly made from a variety of materials depending on the specific requirements of the application. The most common materials used in the manufacturing of resistors include carbon film, metal film, and wirewound. Carbon film resistors are made by coating a ceramic rod with a carbon film, which allows for a high degree of precision and stability. Metal film resistors are made by depositing a thin layer of metal, such as nickel-chromium or tantalum nitride, onto a ceramic core, providing a high level of accuracy and reliability. Wirewound resistors are made by winding a resistive wire, typically made of an alloy like nickel-chromium or copper-nickel, around a ceramic or fiberglass core, offering a high power handling capability. Overall, resistors are essential components in electronic circuits and are available in a wide range of specifications to meet the diverse needs of various electronic applications.