1. Power, Work and Energy in Electrical Circuits

2. Potential Difference 1 V = 1 J 1 C

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

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

5. Work-Energy Theorem W=  TE

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?