Question
Fri March 19, 2010 By:

A 60 W electric lamp gives off energy in the form of light at the rate of 7.5 J/s.

Expert Reply
Fri March 19, 2010

Amount of energy given out in the form of light, 7.5 J/s = 7.5 W.

Amount of energy transformed into light = 7.5x100/60 = 12.5 %

Regards,

Team,

TopperLearning.

Home Work Help