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The efficiency of a device such as a lamp can be calculated using this equation: efficiency = (useful energy transferred ÷ energy supplied) × 100 Using the formula, calculate the efficiency of the lamp shown in the diagram above.

User Iancoleman
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Post a picture of the diagram and I can help!

User RngTng
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Answer:

70%

Step-by-step explanation:

I did this on USATestPrep

User Vendettacore
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