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

The primary function of a resistor in an electronic circuit is to limit the flow of electric current. Resistors are passive components that provide resistance to the flow of electrons, thereby controlling the amount of current that can pass through a circuit. This limitation plays a crucial role in protecting sensitive components from excessive current, ensuring that they operate within their designated specifications.

When a resistor is placed in a circuit, it creates a voltage drop across itself according to Ohm's Law, which states that voltage equals current multiplied by resistance (V = IR). By adjusting the resistance value, engineers can precisely manage the current levels, enabling them to design circuits that function correctly without the risk of damage or overheating.

The other options describe functions that are not associated with resistors. For example, amplifying electrical signals is a role of devices like transistors or operational amplifiers, while converting AC to DC voltage typically involves rectifiers. Storing electrical energy is the function of capacitors or inductors rather than resistors. Each of these components serves distinct roles in electronic circuits, highlighting the specialized function of resistors in current limitation.