What is the electrical property that opposes the flow of current through a circuit?

Resistance is the electrical property that opposes the flow of current through a circuit. It is measured in ohms and is a fundamental concept in understanding how electrical circuits function. When a voltage is applied across a circuit, resistance will determine how much current flows according to Ohm's law, which states that voltage equals current multiplied by resistance (V = I x R).

This resistance can come from various elements in a circuit, such as resistors, wires, connections, and any other materials that present opposition to the flow of electrons. The higher the resistance, the less current will flow for a given voltage. Therefore, understanding resistance is crucial for designing and troubleshooting electrical systems, as it plays a vital role in ensuring that circuits operate efficiently and safely.