ResistorsResistors are passive electronic components that are used to control the flow of electrical current in a circuit. They are made of materials that have a specific resistance to the flow of electricity, and are commonly used in a wide range of applications, including power management, signal processing, and safety protection. Resistor are typically classified by their resistance value, which is measured in ohms, and their tolerance, which is the allowable variation in resistance from the nominal value. There are many different types of resistors, including carbon composition, wirewound, and metal film resistors, each of which has its own unique characteristics and applications.