Acd player uses 1,200 joules of energy in 60 seconds. what is the power rating of the cd player? 72,000 w 600 w 20 w 0.05 w

Option (c) is the correct answer.

Explanation:

Power is defined at the amount of work done in per unit time.

Mathematically,          P =

where             P = power

                       W = work

                        t = time

Since, it is given that work or energy is 1,200 joules and time is 60 seconds. Therefore, calculate the power as follows.

                          P =

                              =

                              = 20 joules/second

or,                           = 20 Watt

Thus, we can conclude that the power rating of the CD player is 20 W.