SC-1179
Energy transfer
Lower Sec Science · Secondary 2 · Hard · Energy transfer
A 60 W LED lamp and a 60 W filament lamp are both switched on for 2 hours. The LED lamp converts 40% of the electrical energy to light, while the filament lamp converts only 10% to light. Which statement explains why the LED lamp appears brighter?
- A larger fraction of its electrical energy is converted into light.
- It uses less electrical energy than the filament lamp.
- It converts all of its electrical energy into light.
- It has a higher power rating than the filament lamp.
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