1. Electrical Power Chapter 19 Section 3

2. Energy to Power Electrical Power is the rate of conversion of electrical energy. Electrical Power is the rate of conversion of electrical energy. To push charge through a conductor, work must be done. To push charge through a conductor, work must be done. That work is a form of energy (Electrical Potential Energy) and when used over a certain time, power is created. That work is a form of energy (Electrical Potential Energy) and when used over a certain time, power is created.

3. Electrical Power Equation

4. Electrical Companies Electrical Companies measure energy consumed in Kilowatt-hours. Electrical Companies measure energy consumed in Kilowatt-hours. 1kWh = 3.6x10 6 J 1kWh = 3.6x10 6 J The cost of a kWh can be between $0.05 to $0.20 The cost of a kWh can be between $0.05 to $0.20 –The average kWh in USA for 2011 is $0.1099

5. High Voltage and Energy Transmission Electrical Energy is transferred at high potential differences to minimize energy lost. Electrical Energy is transferred at high potential differences to minimize energy lost. P = IV P = IV P = I²R P = I²R –By decreasing the current and increasing voltage in power lines it reduces the resistance of charge flowing through the power lines.