What formula is used to calculate voltage in a circuit?

The formula used to calculate voltage in a circuit is derived from Ohm's Law, which states that voltage (E) is equal to the current (I) multiplied by the resistance (R). This relationship is fundamental in understanding how electrical circuits operate, as it allows you to determine the voltage drop across a resistor when the current flowing through it and the resistance value are known.

Using this formula, if you know the current flowing in a circuit and the resistance of the component, you can easily calculate the voltage accepted by that component. This concept is crucial for designing and analyzing electrical circuits, ensuring that components are rated correctly to withstand the voltage they will encounter.

The other options provided do not accurately reflect the relationship defined by Ohm's Law. The formula involving division, addition, or subtraction does not define voltage in the context of electrical circuits.