Question

An electric bulb 60W is used 6 hours per day. Calculate the units of energy consumed in a day.

Answer 1

Power = $\frac{energy}{time}$

60 = $\frac{energy}{6\ast 60\ast 60}$;

Energy = 1296000 joules are Consumed per day;

we know 1unit = 3.6*${10}^6$J

Amount of units consumed per day = $\frac{1296000}{3.6\ast {10}^6}$

= 0.36 unit

So, unit of energy consumed per day is 0.36.