Electricity glossary terms chapter 12 que cards

current in which charged particles travel through a circuit in only one direction

a current in which electrons move back and forth in a circuit

an electrical device that changes the size of the potential difference of an alternating current

a safety device that is placed in series with other circuits that lead to appliances and outlets

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

the rate at which an appliance uses electrical energy

a unit of electrical power; 1 kilowatt = 1000 W

a practical unit for electrical power; 1 kW = 1000 W

the energy that is used by an appliance at any given setting; is determined by multiplying its power rating by the length of time it is used

the practical unit of electrical energy

a label that gives details about how much energy an appliance uses in one year of normal use

a meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically

a system of pricing in which the cost of each kW x h of energy used is different at different times of the day

the electricity that is consumed by an appliance or device when it is turned off

the ratio of useful energy output to total energy input, expressed as a percentage

the continuous minimum demand for electrical power

the production of electricity using a source of moving water 

a demand for electricity that is greater than the base load and is met by burning coal and natural gas

the greatest demand for electricity, which is met by using hydroelectric power and natural gas

a source of energy that can be replaced in a relatively brief period of time

a source of energy that cannot be replaced as quickly as it is used

energy that is directly converted from the energy of the sun into electricity

the generation of a direct current when certain materials are exposed to light

A biofuel is a fuel that contains energy from geologically recent carbon fixation. These fuels are produced from living organisms. Examples of thiscarbon fixation occur in plants and microalgae. These fuels are made by a biomass conversion (biomass refers to recently living organisms, most often referring to plants or plant-derived materials). This biomass can be converted to convenient energy containing substances in three different ways: thermal conversion, chemical conversion, and biochemical conversion