What is the DC input power of a transmitter operating at 12 volts and drawing 500 milliamperes?

To find the DC input power, use the power formula P = E x I, where P is power in watts, E is voltage in volts, and I is current in amperes. First, you must convert milliamperes to amperes to use the standard formula. Since there are 1000 milliamperes in one ampere, 500 milliamperes is equal to 0.5 amperes. Next, multiply the voltage by the converted current: 12 V x 0.5 A = 6 watts. If you fail to convert milliamperes to amperes, you might incorrectly calculate a much higher wattage, making distractors like 60 watts or 600 watts seem plausible.