Answer to Question #259374 in Electricity and Magnetism for yuu

Electricity and Magnetism

Question #259374

A 75-W hall light is left on continuously. At 0.04 Ls/kWh, find the cost per week.

Expert's answer

P=75W

"P=\\frac{W}{t}"

"E=W=Pt"

"E=75\\times24\\times7\\times60\\times60=45360000sec"

"E=\\frac{45360000}{1000\\times3600}=12.6Kwh"

"E=0.4\\times12.6Ls=0.504Ls"

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