What does the electric formula 'Voltage = Current x Resistance' help to calculate?

The formula 'Voltage = Current x Resistance' is known as Ohm's Law, which is a fundamental principle in electronics and electrical engineering. It establishes a relationship between voltage, current, and resistance in an electrical circuit. By using this formula, you can determine the voltage present in a circuit when you know the current (the flow of electric charge) and the resistance (the opposition to that flow).

In this context, the correct answer points directly to voltage. The formula allows you to calculate voltage by rearranging the terms, showing that voltage (V) is the product of current (I) and resistance (R). This understanding is essential for troubleshooting electrical issues or designing circuits effectively.

The other options don't apply because power is calculated using a different relationship involving voltage and current (Power = Voltage x Current), amperage refers to the current itself which is one of the variables used within this law, and distance is unrelated to this electrical formula. Thus, the formula specifically aids in finding the voltage when current and resistance values are known, underscoring why voltage is the correct focus here.