How many joules of electrical energy are converted into heat energy and light when a 50W lamp is lit for two hours
Answers
Answered by
4
it would be 1,000,000w for 2 hours
Answered by
13
power is equal to work done over time taken
therefore
50=w/(7200)s
so electrical energy is 50*7200
i.e. 360Kj
therefore
50=w/(7200)s
so electrical energy is 50*7200
i.e. 360Kj
tushar8138:
thanks
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