Physics
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Power consumption
Power consumption
Why does a 100W bulb consume more electricity than a 40W bulb?
Curious Corner
Sep 01, 2025
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Curious Corner
Answered 4 months ago
Power = energy consumed per second. A 100W bulb converts 100 joules/sec into light + heat, while a 40W bulb converts only 40 joules/sec. That’s why your electricity bill depends on wattage × hours used.
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