Question

30 joules of electrical energy bulb generates 20 joules of light energy. How much energy is lost? What is the form of the lost ? What is the form of the lost energy? Find the efficiency of the bulb.​

Answer 1

Mark me as brainliest answer then I will follow you

Answer 2

since Q1 is 30 joule and Q2 is 20 joule

(1) mean lost in energy is 30-20=10joule, which is lost in form of light energy

(2) efficiency is given by

η=1-Q2/Q1

η=1-20/30

η=1-0.66

η=0.34

η=0.4

$<marquee><font color="blue">❤ Mark it as brilliant️❤️</marquee>$