book+2,+2.5

V. Electric Power A. electrical appliance transforms electrical energy into another form. Energy transformation enables the appliance to perform its function B. Power- the rate at which energy is transformed from one form to another C. Paying for Electrical energy
 * 1) Unit of power= Watt (W)
 * 2) Power = voltage x current P=VI
 * 1) energy use depends on power and time
 * 2) electric bill charges for energy use
 * 3) energy = power x time
 * 4) electrical power measured in kilowatts (kW); time- hours (kWh)
 * 5) kilowatt hours = kilowatts x hours
 * 6) measured by a meter

Quiz 2.5
 * 1) power = voltage x current P= Vx 1
 * 2) energy = power x time E = P x T
 * 3) 120 v x 2 A = @40 W
 * 4) .240 kW x 2 h = .48 kWh
 * 5) 1200 W / 120V = 10 A
 * 6) 12 kWh 1 h = 1.2 kWh
 * 7) The rate at which energy is transformed from 1 form to another.

Study Guide nothing