Question

Find the energy when 5 bulbs of 20 watt each and an electrical heater of 100 watt are used continuously for 5 hours a day after the month of February in 2019?

Answer 1

energy= power* time

=20*5

energy consumed by 1 bulb for 5 hrs in a day = 100 J

energy consumed by 5 bulb for 5 hrs in a day = 100 *5 J

                                                                            = 500 J

energy consumed by 5 bulb for 5 hrs in 306 days = 500*306

( the number of days from march 1 to december 31 is 306 days)  

                                                                                    = 153000 J