# Electricity 3

 Direct Current (DC) Current in which particles travel through a circuit in only one direction Alternating Current (AC) A current in which electrons move back and forth in a circuit Transformer An electric device that changes the size of the potental difference of an alternating current Circuit breaker A safety device that is placed in series with other circuits that lead to appliances and outlets Fuse  A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in series with other circuits that lead to appliances and outlets  Electrical power The rate at which an appliance uses electrical energy Watt (W) A unit of electrical power 1 kilowatt = 1000W Kilowatt (kW) A practical unit of electrical power1kW = 100 W Electrical energy the energy that is used by an appliance at a given setting; is determined by multiplying its power rating by the length of time it is used Kilowatt-hour the practical unit of electical energy EnerGuide label A label that gives details about how much energy an appliance uses in one year of normal use ex;  Smart meter A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically ex; Time of use pricing A system of pricing in which the cost of each kW x h of energy used is different at different times of the day phantom load The electricity that is consumed by an appliance or device when it is turned off Efficiency The ratio of useful energy output to total energy input, expressed as a percentage Base load The continuous minimum demand for electrical power Hydroelectric power generation  The production of electricity using a source of moving water Intermediate load A demand for electricity that is greater than the base load and is met by burning coal and natural gas Peak load The greatest demand for electricity, which is met by using hydroelectric power and natural gas Renewable energy source A source of energy that can be replaced in a relatively brief period of time Non- renewable energy source A source of energy that cannot be replaced as quickly as it is used Solar energy  energy that is directly converted from the energy of the Sun into electricity Photovoltaic effect The generation of a direct current when certain materials are exposed to light Biomass energy Energy that is generated from plant and animal matter Authorbijaldesai ID182345 Card SetElectricity 3 Descriptionchapter 12 Updated2012-11-08T00:51:58Z Show Answers