Answer: Option (c) is the correct answer.
Explanation:
Power is defined at the amount of work done in per unit time.
Mathematically, P = [tex]\frac{W}{t}[/tex]
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 = [tex]\frac{W}{t}[/tex]
= [tex]\frac{1200 joules}{60 seconds}[/tex]
= 20 joules/second
or, = 20 Watt
Thus, we can conclude that the power rating of the CD player is 20 W.
