Question

A light bulb converts electrical energy into light and heat energy. How much energy does a 60 W bulb convert in: a) 1 second? b) 10 seconds? c) 1 minute d) 1 week

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Answer 1

Total power, P=60W ; Total Time=1min=60s

As, Power=

Time

Energy

Energy=Power×Time=60×60=3600Ws=3600 J

Power is not something which is consumed rather it is rate of energy consumption by electrical appliances. 60 Watt bulb means it can consume 60 Joule energy per second so it will consume 60 Joule in one second.

A 60-watt incandescent bulb uses 60 watts of energy; we bill for energy in kilowatt hours which is 1,000 watts continuously for 1 hour. So, a 60-watt bulb uses 60 watts hours or . 06 kilowatt hours of energy for each hour it's on