What does the abbreviation kWh stand for?

What does the abbreviation kWh stand for?

• A. Kilowatt-hours
• B. Kilowatts-hour
• C. Kilowatt-hour
• D. Killer Watt Hours

Answer: (C)

This tests understanding that kWh is a unit of energy, not a rate. A kilowatt is a unit of power, which tells you how fast energy is used, while an hour is a unit of time. Multiplying power by time gives energy, so one kilowatt-hour is the amount of energy used when a kilowatt of power is consumed for one hour. That’s why electricity usage is billed in kWh. In numbers, 1 kWh equals 1000 watts × 3600 seconds = 3.6 million joules. When you hear kilowatt-hour, that’s the standard name for the energy unit; calling it kilowatt-hours is just using the plural form when you’re talking about multiple units, but the abbreviation remains kWh. Forms like Kilowatts-hour or Killer Watt Hours aren’t standard.

This tests understanding that kWh is a unit of energy, not a rate. A kilowatt is a unit of power, which tells you how fast energy is used, while an hour is a unit of time. Multiplying power by time gives energy, so one kilowatt-hour is the amount of energy used when a kilowatt of power is consumed for one hour. That’s why electricity usage is billed in kWh. In numbers, 1 kWh equals 1000 watts × 3600 seconds = 3.6 million joules. When you hear kilowatt-hour, that’s the standard name for the energy unit; calling it kilowatt-hours is just using the plural form when you’re talking about multiple units, but the abbreviation remains kWh. Forms like Kilowatts-hour or Killer Watt Hours aren’t standard.