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The formula to calculate electrical power is derived from Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). Power (P) in an electrical circuit is fundamentally the rate at which energy is consumed or produced, which can be expressed as the product of voltage and current. Thus, the correct relationship can be stated as:

Power (P) = Voltage (V) × Current (I)

This formula indicates that power increases as either voltage or current increases, making it essential for understanding how electrical systems operate. When voltage is applied across a component and current flows through it, the power consumed by the component can be effectively determined using this formula.

In contrast to this, the other options do not accurately express the relationship between power, voltage, and current in electrical systems. For instance, dividing current by voltage or resistance by voltage does not yield meaningful results in the context of calculating power, and adding voltage and current does not accurately represent the physical relationship within electrical circuits.