How is Resistance defined in electrical terms?

Resistance in electrical terms is defined as the opposition to the flow of electric current in a circuit. It is quantified using Ohm's Law, which states that resistance is equal to voltage divided by current. The unit of measurement for resistance is the ohm, symbolized by the Greek letter omega (Ω).

When calculating resistance, if you know the voltage across a component in the circuit and the current flowing through it, you can easily find the resistance. For example, if a component has a voltage of 10 volts and a current of 2 amperes, the resistance can be calculated as 10 volts / 2 amperes, which equals 5 ohms. This relationship helps in designing and analyzing electrical circuits to ensure they operate safely and effectively, taking into account the resistance that may affect the efficiency and performance of the circuit.

The other options do not correctly define resistance: one defines current, another refers to power, and the last one describes electric potential difference. Each of these concepts is important in electrical engineering, but they pertain to different principles and measurements rather than defining resistance.