5
QuizMultiple Choice

Electricity Use in Homes and Businesses — Quiz

Question 5 • Physics

Compact fluorescent lightbulbs (CFLs) cost more than incandescent lightbulbs and have lower wattages than incandescent bulbs. Which statement best describes why a homeowner would choose to pay the extra money for the CFLs?

Answer
A
CFLs will cost less to run in the long term because they use less energy than the incandescent bulbs as a result of the lower wattage.
B
CFLs use more energy as a result of the lower wattages, but electric companies charge less for energy used in CFLs.
C
CFLs will cost less to run in the long term because they are brighter and would need to be on for fewer hours.
D
CFLs use the same amount of energy as incandescent lights, but they last much longer and do not need to be replaced as often.

Explanation

A bulb’s wattage indicates how quickly it uses electrical energy. Because CFLs have lower wattages, they use less energy than incandescent bulbs for the same amount of time, which can reduce electricity costs over the long term. This saving can make the higher purchase price worthwhile; electric companies do not charge a special lower rate for energy used by CFLs.

AI-written and checked against the verified answer.

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