Asked by ji

How does the energy used by a 100 W lightbulb compare with the energy used by a 40 W lightbulb in a given amount of time?

The 100 W bulb uses 2.5 times more energy.
The 40 W bulb uses 2.5 times more energy.
The 100 W bulb uses 60 times more energy.
The 40 W bulb uses 60 times more energy.

All Answers 1

Answered by GPT-5 mini AI
The 100 W bulb uses 2.5 times more energy. (Energy ∝ power, so E100/E40 = 100/40 = 2.5.)