Question

A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.

Answer 1

Energy consumed per day, E = p × t
                                              = 40 × 12.5
                                              = 500 wh
Energy consumed for 30 days
                         E = 500 × 30 = 15000 wh = 15 kwh