Electricity Flashcards Chapter 12

 Direct Current (DC) Current in which charged 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 electrical device that changes the size of the potential 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 = 1000 W Kilowatt (kW) A practical unit of electrical power; 1 kW = 1000 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 (kW-h) The practical unit of electrical energy EnerGuide label A label that gives details about how much energy an appliance uses in one year of normal use Smart meter A meter that records the total electrical energy used hour by hour and sends this 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 times of the day Phantom load The electricity that is consumed by an appliance or device when it is turned offi.e.- Clock of a DVD player 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 Renewable energy source A source of energy that can be replaced in a relatively brief period of timei.e.- Solar Energy Non-renewable energy source A source of energy that cannot be replaced as quickly as it is usedi.e.- Coal Burning 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 Authordaynanairn ID182373 Card SetElectricity Flashcards Chapter 12 DescriptionCHAPTER 3 Updated2012-11-09T17:52:51Z Show Answers