What is the effective difference of potential between any two conductors of a circuit called?

The effective difference of potential between any two conductors in a circuit is referred to as voltage. Voltage is a measure of the potential energy per unit charge that is available to drive electric current through a circuit. It represents the force that pushes electric charges through a conductor and is a fundamental concept in understanding how electrical systems operate.

In an electrical circuit, the voltage is what causes current to flow from one point to another. It can be thought of as the pressure that pushes electrons through the wires, overcoming any resistance present in the circuit. The unit of measurement for voltage is the volt (V), which quantifies how much electrical potential difference exists between two points.

Understanding voltage is crucial for anyone working with electrical systems, as it influences how much current will flow and how much power can be delivered.

The other options, while related to electricity, do not directly describe the difference of potential between conductors. Current refers to the flow of electric charge, resistance denotes the opposition to that flow, and power is the rate at which electrical energy is consumed or converted. Each of these terms plays a significant role in electrical theory and practice, but they do not capture the concept of voltage as the measure of potential difference between conductors.