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Class 10 > Learn Science > A lamp consumers 1000 J of electrical energy in 20...
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A lamp consumers 1000 J of electrical energy in 20 seconds. What it its power?

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1000j/20second=50watt
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Power=work/time Therefore Power= 1000/20 = 50 J/s or 50 Watt
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power=work/time work=1000j time=20sec power=1000j/20sec=50 watt
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