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32 votes
32 votes
A hypothetical light bulb is provided 450 kilojoules of electricity; however, 90 kilojoules of electric energy was wasted producing heat, while the rest of the energy was actually used to produce light. What is the % efficiency of this light bulb?

*
45%
80%
0.2%
20%
None of the above

User Simon Mo
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1 Answer

16 votes
16 votes
None of the above because that the answers
User Omittones
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