Question

If an electric iron of $1200W$ is used for $30minutes$ everyday, find electric energy consumed in the month of April.

Answer 1

Step 1: Given data

Power of electric iron, $P=1200W$

Usage per day $=30min=\frac{30}{60}=0.5hrs$

Number of days in the month of April $=30days$

Step 2: The electrical energy consumed can be calculated using the formula

$$\begin{gathered} Power\left(P\right)=\frac{Energy\left(E\right)}{Timetaken\left(t\right)} \\ \Rightarrow 1200W=\frac{E}{0.5h} \\ \Rightarrow E=1200\times 0.5\times 30 \\ \Rightarrow E=1800Wh=18kWh \end{gathered}$$

Hence, the electric energy consumed in the month of April is $18kWh$.