A 100-W light bulb is left on for 10.0 hours.Over this period of time,how much energy was used by the bulb?

Question

Quizplus · Accepted Answer

To find out the energy used by the bulb, we need to use the formula:
Energy = Power x Time
Here, Power = 100 W and Time = 10.0 hours
Therefore, Energy = 100 W x 10.0 hours = 1000 Wh = 1 kWh (kilo-watt hour)
Converting kWh to joules, we get:
1 kWh = 3.6 x 10^6 J
Therefore, Energy = 1 kWh = 3.6 x 10^6 J
The closest option to this answer is C, which is 3,600,000 J.

A 100-W Light Bulb Is Left on for 10