Resistors are connected to electrical circuits to achieve which purpose?

Resistors play a crucial role in electrical circuits primarily by limiting current flow. When a resistor is introduced into a circuit, it impedes the flow of electric current according to Ohm's Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

In simple terms, when you increase resistance (by adding a resistor), you decrease the amount of current that can pass through for a given voltage. This function is essential for protecting circuit components from excessive current that could result in overheating or damage. Resistors enable the safe operation of various devices by ensuring that the current remains within acceptable limits, providing reliability and stability to the overall circuit operation.

The other options refer to concepts related to voltage, capacitance, and inductance, which are not the primary functions of resistors. Resistors do not increase voltage, control capacitance, or reduce inductance in the circuit; their main purpose is to manage current flow, making the option regarding limiting current the correct choice.