If you have light bulbs marked 40 watts, 50 watts, 60 watts and 100 watts, which one will consume electrical energy at the highest rate?

The watt is the standard unit of electrical power, which measures the exact rate of energy consumption. Mathematically, one watt is equal to one joule of energy used per second. Because the wattage directly states the rate of energy use, simply looking for the highest number gives you the correct answer. The 100-watt bulb consumes energy faster than the 40, 50, or 60-watt bulbs, which is why it typically produces more light and heat.