Which of the following is commonly used to measure electrical energy consumption?

Kilowatt-hours is the standard unit used to measure electrical energy consumption. It quantifies the amount of energy used over time, specifically how many kilowatts of power have been consumed for one hour. This unit is particularly useful for determining the cost of electrical energy as it reflects both the power used (in kilowatts) and the duration (in hours) it's used for.

For example, if a device consumes 1 kilowatt of power and operates for 1 hour, it uses 1 kilowatt-hour of energy. Utility companies typically bill customers based on the kilowatt-hours they consume, making it the most relevant measurement for discussing energy usage in homes and businesses.

The other options are important electrical measurements but represent different concepts: amperes measure current, ohms measure resistance, and watts measure power at a specific moment. They do not represent the total energy consumed over time like kilowatt-hours do.