How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes?

To find the electrical power delivered in a DC circuit, you must use the standard power formula: Power (P) equals Current (I) multiplied by Voltage (E), commonly written as P = I × E. In this specific question, the voltage (E) is 13.8 volts and the current (I) is 10 amperes. Multiplying 13.8 by 10 simply shifts the decimal point one place to the right, giving a total of 138 watts. The incorrect answers are the result of adding, subtracting, or dividing the two numbers, none of which correctly determine electrical power.