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Multiple choice

How much energy in an incandescent lightbulb is wasted/lost as heat?

  1. 95%

  2. 15%

  3. 50%

  4. 30%

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Incandescent bulbs are highly inefficient, converting only about 5% of energy into light, while the rest is dissipated as heat.

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