Question

An electric motor takes 8.16 A from a 110 V line. How much energy is consumed in 0.29 hour? Express your answer in kW h.

Answer 1

First, let's calculate the power used by the motor with the formula below:

`\begin{gathered} P=I\cdot V\\ \\ P=8.16\cdot110\\ \\ P=897.6\text{ W}=0.8976\text{ kW} \end{gathered}`

Now, let's multiply the power by the time to find the energy consumed:

`\begin{gathered} E=P\cdot t\\ \\ E=0.8976\cdot0.29\\ \\ E=0.26\text{ kWh} \end{gathered}`