What is the primary function of a resistor in an electrical circuit?

The primary function of a resistor in an electrical circuit is to inhibit current flow. Resistors are designed to oppose the flow of electric current, which helps control the amount of current that can pass through a circuit. This is achieved by providing resistance, which is measured in ohms. By limiting the current, resistors help to protect sensitive components from excessive current that could lead to damage, and they also allow for the adjustment of voltage levels in various parts of a circuit.

In practical applications, resistors can be used to divide voltages, control signal levels, and determine the gain of amplifier circuits. Their role in limiting current is essential for maintaining the functionality and safety of electrical systems.