Tutorial on the Physics of Electricity - Part 4
In DC circuits, power is just voltage times current.
P = VI = 12 x 5 = 60 W
Electrical engineers express energy either in kilowatt-hours (kW-hr) or joules (J), depending on the application.
How much energy is delivered to the headlight if it is left on for 3 days? Round your answer to the nearest kW-hr.
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