Question

A ceiling fan uses 0.45 kWh of energy in 6 hours. What is the power rating of the fan?

A) 0.075 W
B) 2.7 W
C) 13 W
D) 75 W

Answer 1

75W

Step-by-step explanation:

mhm yup.

Answer 2

The power is defined as the energy used divided by the time :

`P= (E)/(t)`
where E is the energy and t the time.
In our problem, the energy used is E=0.45 kWh=450 Wh while the time is t=6 h, so the power used by the fan is

`P= (E)/(t)= (450 Wh)/(6 h)=75 W`