Question

an electrical lamp consumes 100w of power.if the supply voltage is 220v the energy consumed in 30 minute
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Answer 1

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Power = 100 W

Voltage =220V

Time =30 minute

T=30 ×60 = 1800sec 

Energy =? 

Solution :-
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E=Pt 

E=100 ×1800

E = 180,000J

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Answer 2

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