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Electricity
A form of energy that results from the interactions of charged particles, such as protons or electrons
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Static charge(static electricity)
An electric charge that tends to stay on the surface of an object, rather than just flowing away quickly
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Charging by friction
A process in which objects of different materials rub together, producing a net static charge on each
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Electrostatic series
A list of materials that have been arranged accordingly to there ability to hold on electrons
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Insulator
A material in which electrons cannot move easily from one atom to another
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Conductor
A material in which electrons can move easily from one atom to another
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Semi conductor
A material in which electrons can move fairly well between atoms
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Ground
An object that can supply a large number, and can remove a very large amount of electrons from, a charged object, thus neutralizing the object
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Electroscope
A device used to detect the presence of an electric charge
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Charging by contact
Generating a charge by touching a neutral object with a charged object
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Laws of electric charges
Laws that describe how two objects interact electrically when one or both are charged
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Electric fields
A property of the space around a charged object, where the effect of its charge can be felt by other objects
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Induced charge seperation
The movement of electrons in a substance, caused by an electric field of a nearby charged object, without direct contact between the substance and the object
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Ion
A charged atom or a group of atoms
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Lightning rod
A metal sphere or point, attached to the highest part of a building and connect to the ground
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Electrostatic participator
A type of cleaner that removes unwanted particles and liquid droplets from a flow of gas
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Van de Graaff generator
A device that accumulates and transfer very large amounts of charge
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Radiation dosimeter
A small device that measures and detects exposure to radiation
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Electric circuit
a closed path along which electrons that are powered by an energy source can flow
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Voltaic cell
A source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a solution that is a conductor
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Battery
A connection between two or more cells
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Electrode
One of two terminals in a cell or battery
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Electrolyte
A solution or paste that conducts charge
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Dry cell
A cell that contains electrolyte that is paste
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Wet cell
A cell that contains electrolyte that is liquid
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Primary cell
A cell that you can only use once
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Secondary cell
A cell that can be recharged and used more than once
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Fuel cell
A cell that generates electrical charge through chemical reactions involving fuel that is stored outside of the cell
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Solar cell
A cell that converts sunlight into electrical energy
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Terminal
A location on a cell or battery that must be connected to other components of a circuit for the circuit to work
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Switch
A control device that can break or complete a circuit that it is connected to
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Open circuit
A circuit that contains a gap or break
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electrical current
the rate of movement of electrical charge
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Coulomb
The quantity of charge that is equal to the charge of 6.25 x 10 to the power of 18 electrons
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ampere
the unit of electrical unit, equivalent to one coulomb per second
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Electrical resistance
the property of a substance that hinders electrical current and converts electrical energy to other forms of energy
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Resistor
A device used to decrease the current of a component to a specific amount
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load
a resistor or any other device that transforms electricity into head, motion, sound or light
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Potential difference
the difference between potential energy per unit of charge at two points in a circuit
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Volt
the unit for potential difference, equivalent to one joule (j) per coulomb (c)
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Circuit diagram
A diagram that uses standard symbols to represent the components in an electric circuit and their connections
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Series circuit
A circuit where there is only 1 path where electrons can flow along
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Parallel circuit
A circuit where there is more than 1 path where electrons can flow along
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Ohm's law
the ratio of potential difference to current is a constant called resistance
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ohm
the unit for resistance equivalent to one volt per ampere
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superconductor
A material which electric charge can flow with no resistance
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non-ohomic
doesn't follow the ohm law
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Loads in series
The sum of all resistors resistance is equal to the total resistance
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Loads in parallel
The total resistance is less than each resistance
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Direct Current (DC)
current in which charged particles travel through a circuit move in one direction
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Alternating current (AC)
current in which electrons move back and forth in a circuit
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Transformer
an electrical device that changes the size of the potential difference of an alternating current
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Circuit breaker
A safety device that is placed in series with other circuits, which lead to appliances and outlets
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Fuse
A safety device that is found on older buildings and some appliances; like a circuit breaker, it is placed in series with other circuits, which lead to appliances and outlets
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Electrical power
the rate at which an appliance uses electrical energy
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Watt (W)
a unit of electrical power
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Kilowatt (KW)
a practical unit of electrical power ; 1 KW = 1000 W
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Electrical energy
the energy that is being used by an appliance at a given setting; determined by multiplying the power rating of an appliance by the length of time it is used
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Kilowatt-hour (KW·h) the practical unit of electrical energy
the practical unit of electrical energy
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Energuide label
a label that gives details about how much energy an appliance uses in one year of normal use
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Smart meter
a meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically
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time of use pricing
a system of pricing in which the cost of each Kw·h of energy is used at different times of the day
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Phantom load
the electricity that is consumed by a device or appliance when it turned off
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efficiency
the ratio of useful energy output to total energy input, expressed as a percentage
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base load
the continues minimum demand for electrical power
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hydroelectric electricity generation
the generation of electrical power using the source of moving water
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Intermediate load
a demand for electricity that is greater than the base load and is met by burning coal and natural gas
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peak load
the greatest demand for electricity, which is met by using hydroelectric power and natural gas
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renewable energy source
A source of energy that can be replaced in a relatively short period of time
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non renewable energy source
a source of energy that can't be replaced as quick as it is used
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wind farm
many large wind tribunes at one location
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solar energy
energy that is being directly converted from the sun into electrcity
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photovoltaic effect
the generation of a direct current when certain materials are exposed to light
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biomass energy
energy that is generated from animal and plant matter
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