How is resistance best defined?

Resistance is best defined as the opposition to current in an electrical circuit. This concept is fundamental in understanding how electrical systems function. When current flows through a conductor, resistance acts as a barrier that impedes the flow of electrons. This relationship is described quantitatively by Ohm’s Law, which states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance.

In practical terms, high resistance means less current flows for a given voltage, while low resistance allows more current to flow. This is critical in circuit design, where components are chosen based on their resistance to control the current levels, protect sensitive equipment, and ensure efficiency.

Other definitions provided relate to concepts that do not accurately encapsulate resistance. Force that pushes electrons implies a directional effect rather than opposition; temporary storage of energy refers to capacitance, not resistance; and flow of electrons describes current itself, not the opposition to that flow. Understanding resistance and its role in electrical circuits is crucial for effectively working with electrical systems.