Question

A bulb of 30 W is switched ON for 15 hours per day. How much electrical energy is consumed in the month of June?

Answer 1

Step 1: Given data

Power of bulb; $P=30W$

Time; $t=15hour/day$

Step 2: Formula used

Formula for power is given as,

$Power\left(P\right)=\frac{Energy\left(E\right)}{time\left(t\right)}$

Step 3: Finding energy

Energy consumed per day,

$$\begin{gathered} E=Pt=30\times 15=450Whperday \\ E=0.45KWh/day \end{gathered}$$

Total energy consumed in 30 days;

$E=30\times 0.45=13.5KWh$

Hence, electrical energy is consumed in the month of June is $13.5KWh$.