Resistors are essential two-terminal electronic components made from resistive materials designed to control the flow of current in a circuit. Their resistance value is influenced by factors such as temperature, material, length, and cross-sectional area, with the temperature coefficient serving as a critical measurement for resistance variation due to temperature changes.

Primarily used to regulate and stabilize current and voltage, resistors also serve in advanced functions such as amplifying circuit feedback, voltage-current conversion, and providing overload protection for input voltage or current. These versatile components are indispensable for achieving reliable circuit performance across diverse electronic applications.