Question

3. A 60 W electric lamp gives off energy in the form of light
at a rate of 7.5 joule per second. What percentage of
energy does the lamp transform into light energy?
Dolhi 1998​

Answer 1

Answer:

12.5%

The energy given off is 7.5 J /second. This means that the lamp is giving off 7.5W. You simply have to calculate that how much percentage is 7.5of 60. Hence our answer is 12.5%Hope this helps!!!!!!!!!!!!