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

A resistor plays a crucial role in an electrical circuit by limiting or controlling the flow of electric current. It is designed to resist the flow of electricity, which leads to a reduction in both voltage and current in the circuit. This characteristic is essential for protecting sensitive components from excessive current that could lead to damage, ensuring that the right amount of current flows through various parts of the circuit.

In addition to its protective functions, resistors also help in dividing voltage within circuits, making them suitable for creating specific voltage levels needed for other components. This can be particularly important in circuits with multiple components that require different voltage levels to operate correctly.

By controlling current flow and voltage, resistors can help maintain the stability and functionality of an electrical system, allowing various components to operate efficiently and effectively.