What is the formula used to calculate electrical power (P) in a DC circuit?

The correct formula to calculate electrical power (P) in a DC circuit is derived from the relationship between voltage (E), current (I), and power (P). In a DC circuit, electrical power is calculated using the formula P = I × E, where P represents power in watts, I represents current in amperes, and E represents voltage in volts.

This formula indicates that power is the product of the current flowing through the circuit and the voltage applied across it. By multiplying the current by the voltage, you determine how much energy is consumed or generated per unit of time. This relationship is fundamental to understanding how devices operate in a DC circuit and is widely used in electrical engineering and physics.

The other options either do not represent the correct relationship between voltage, current, and power or are mathematically incorrect, thus not valid as formulas for calculating electrical power in a DC circuit.