How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?

Just like the previous power calculation, we use the formula P = I x E, known affectionately as the "PIE" formula. Power is the product of voltage and current. Here, the voltage (E) is 12 volts and the current (I) is 2.5 amperes. Multiplying 12 volts by 2.5 amperes gives exactly 30 watts of power. Distractors like 4.8 watts or 0.208 watts come from mistakenly dividing the numbers (12 / 2.5 or 2.5 / 12), while 14.5 watts is the result of erroneously adding the two values together.