Answer:
120Wh
Step-by-step explanation:
A 120 W light bulb uses 120 watt-hours (Wh) of energy in one hour. This means that if the light bulb is kept on for one hour, it will consume 120 Wh of electricity.
If you want to calculate the energy consumed by the light bulb over a longer period of time, you can use the following formula:
Energy (in kilowatt-hours) = Power (in watts) x Time (in hours) / 1000
Using this formula, the energy consumed by a 120 W light bulb kept on for 1 hour is 0.12 kWh.