Question

question 26 of 29
a tv has a power of 110 watts and an efficiency of 75 percent. how much power is wasted as heat?
a. 27.5w
b. 4.4w
c. 1.5w
d. 82.5w

Explanation:

Step1: Calculate the wasted - power percentage

The efficiency is 75%, so the percentage of power wasted is $100\% - 75\%=25\%$.

Step2: Calculate the wasted power

The total power of the TV is 110 watts. The wasted power $P_{wasted}$ is given by $P_{wasted}=0.25\times110$ watts.
$P_{wasted}=27.5$ watts.

Answer:

A. 27.5W