What unit is commonly used to indicate power rating of household appliances? 1.) joule 2.) watt 3.) horsepower 4.) feet-pounds

The answer is Watt

Power is the rate at which energy is used. The unit of power is the watt , which has the symbol W. For example, a 20 W electric lamp uses 20 J of electrical energy every second to stay alight. The meters that are installed at our homes for electrical usage measures power in kilowatts. So we can say that option 2 is the correct answer.