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Power, Work, and Energy in Electrical Circuits

Dive into the world of electrical circuits and learn about potential difference, power units, work-energy theorem, heating effects, kilowatt-hours, and calculating electricity costs with examples of incandescent and CF bulbs.

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Power, Work, and Energy in Electrical Circuits

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  1. Power, Work and Energy in Electrical Circuits

  2. Potential Difference 1 J 1 V = 1 C

  3. (1J)1C =1W (1A)1V = (1C)1 s Power Units 1 J 1 C 1 V = 1 A = 1 C 1 s

  4. Power P=VI Work W=P t W=V I t

  5. Work-Energy Theorem W=DTE

  6. Heating In the real world, much of the electrical energy of a circuit is turned into thermal energy.

  7. Kilowatt-Hours Most electric bills are calculated using the kilowatt-hour as the unit. A kilowatt-hour is an amount of energy.

  8. Cost - 20¢ kWhr What is the cost of running a 60 W incandescent bulb for 1000 hours? What is the cost of running a 13 W CF bulb for 1000 hours?

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