# Chapter 12 electricity flash cards

 Direct current(DC) Currernt in which charge particles travel through a circuit in only one direction Alternating current(AC) A current in which particles move back and forth in a circuit Transformer Not a robot that tries to save or destroy the earth but an electrical device that changes the size of the potential difference of an alternating current Circuit breaker A saftey device that is placed in series with other circuits that lead to appliances and outlets Fuse A saftey 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 killowatt=1000W Kilowatt A particle unit of electrical power; 1kw=1000W Electrical energy The energy that is used by an appliance at a given setting; is determinded by multiplying its power rating by lenghth of time used Kilowatt-hours(kW.h) The particle unit of electrical energy EnerGuide label A label tahat gives details about how much energy an appliance uses in one year of normal use Smart meter A meter that records he total electrical energy usedĀ  hour by hour and sends thisĀ information to the utility company automatically Time of use pricing A system of pricing in which the cost of each kW.h of energy used is different at different times of the day Phantom load The electricity that is consumed by an appilance or device when it is turned off Efficency The ratio of useful energy output ,expressed as a percentage Base load The countinuous minimum demand for electrical power Hydroelectric power generator(The tounge twister) The production of electricity using a source of moving water Intermidiate load A demand for electricity that is greater than the base load and is met by burning fossil fuels and natural gas Peak load The greatest demand for electricity ,which is met by using hydroelectricity power and natural gas Renewable energy source A source of energy that can be replaced in a relativley breif period of time Non-renewable energy source A source of energy that cannot be replaced as quickley as it is used Solar energy Energy that is directley converted from the energy of the sun into electicity Photovoltaic effect The generation of a direct current when certain materials are exposed Biomass energy Energy that is generated from plant and animal matter AuthorAamir101 ID182350 Card SetChapter 12 electricity flash cards DescriptionChapter 12 electricity flash cards Updated2012-11-07T23:31:18Z Show Answers