What is the correct formula associated with calculating apparent power?

The formula for calculating apparent power in an electrical system is represented by the product of voltage and current, which corresponds to the correct choice. Apparent power is measured in volt-amperes (VA) and reflects the total amount of power flow in an AC circuit, irrespective of the phase difference between voltage and current.

This formula is crucial for determining how much power is being drawn from the electrical system as it includes both the true power (the power that performs useful work) and reactive power (the power that oscillates between the source and the load). Apparent power encompasses all of these aspects, helping electrical engineers and technicians to understand the overall power dynamics in a circuit.

In contrast, the other options represent different calculations that are not related to apparent power. Voltage multiplied by resistance calculates the power loss due to heat across a resistor but does not encompass the full concept of apparent power. Dividing voltage by current yields a measure of resistance (Ohm's law), while current divided by voltage does not have a physically meaningful interpretation in the context of power calculations. Thus, the best way to represent apparent power is indeed by using the formula that involves voltage multiplied by current.