Question

A toaster oven ( 1500 w), an large AC unit ( 1700 w), and 100 watt bulb  are connected in parallel with a 120 volt.   Determine the total energy used by these appliances in a day in kwh. The time of usage for the toaster over is 1 hour. ac 12 hours, and 100 w bulb 10 hours

Answer 1

In order to calculate the energy used per day by each appliance, let's multiply the power by the amount of time used in a day:

$E=W\cdot t$

For the toaster oven, we have:

$E_1=1500\cdot1=1500\text{ Wh}=1.5\text{ kWh}$

For the AC, we have:

$E_2=1700\cdot12=20400\text{ Wh}=20.4\text{ kWh}$

For the bulb, we have:

$E_3=100\cdot10=1000\text{ Wh}=1\text{ kWh}$

So the total energy used in a day is:

$\begin{gathered} E=E_1+E_2+E_3 \\ E=1.5+20.4+1 \\ E=22.9\text{ kWh} \end{gathered}$