Chapter 11 glossary terms gr. 9 science Ms Day
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Electric Circuit
 A closed path where electrons that are power by an energy source can flow.
 ex. any sort of electrically powered appliance needs an electrical circuit to function.
 Related termsCircuit diagram

Voltaic Cell
 A source of energy that produces electrical current by chemical reactions involving two different metals or metal compounds , separated by a solution that is a conductor.
 Related termsBattery, wet cell, dry cell

Battery
 A connection of at least two cells.
 ex. Duracell makes batteries
 related terms voltaic cell, wet cell, dry cell, electrode

Electrode
 One of the two metal terminals in a cell or battery.
 ex. A cell has negative and positive electrodes
 Related terms Electrolyte, Cell

Dry Cell
 A cell that contains an electrode that is a paste.
 Related terms Wet cell, Cell

Wet cell
 A cell that contains a liquid electrode.
 Related terms Dry cell, Cell

Primary Cell
 A cell that can only be used once.
 ex. Nonrechargeable batteries are primary cells.
 related terms Secondary cell

Secondary Cell
 A cell that can be recharged and used more thn once.
 ex. Cells used in controllers can often be recharged and used again
 Related terms Primary cell, fuel cell, solar cell

Fuel Cell
 A cell that generates electricity through chemical reactions of fuel that is stored outside of the cell
 Related terms Solar cell, Secondary cell, cell

Solar Cell
 A cell that converts the suns sunlight into electrical energy
 ex. A solar panel
 Related terms Secondary cell, cell

Terminal
 A position on a cell that must be connected to other components in order to form a circuit.
 ex. A cell has a negative and positive terminal.

Switch
 A device that can complete or break a circuit, completing it or not completing it.
 ex. A power button on a flashlight is a switch.
 Related terms Open circuit, Closed circuit

Open Circuit
 A circuit that contains a gap or break. Nothing works in an open circuit.
 ex. When a light is turned off, its an open circuit.
 Related terms Electric circuit, Closed circuit

Electric Current
 A measure of the amount of charged particles pass by a certain spot in an electric circuit each second
 ex. Electric current passes through a closed circuit
 Related terms Electric circuit

Coulomb (C)
 A quantity of charge that is equal to 6.25x10 to the power of 18 electrons
 ex. One coulomb of charge passes by a circuit per second

Ampere (A)
 The unit of electric charge equivalent to one coulomb per second.
 ex. One ampere of charge passes by a circuit

Electrical Resistance
 The property of a substance that hinders electric current, and then converts this electrical energy into other forms of energy.
 ex. An electrical stove has a high electrical resistance
 Related terms Resistor, load

Resistor
 A device that is used in an electric circuit to decrease the current through a component by a specific amount
 ex. A stove is a resistor
 Related terms electrical resistance, load

Load
 A device, usually a resistor, that transforms electrical energy into heat, motion sound or light
 ex. A stove is a load
 Related terms Resistor, Electrical resistance

Potential Difference (voltage)
 The difference in electrical energy between two points in a circuit.
 ex. This battery has a potential difference of 5V
 Related termsVolt

Volt
 The unit used for potential difference, equal to one joule (J) per coulomb (C).
 ex. The potential difference of of this battery is 5V
 Related termsPotential difference

Circuit Diagram
 A diagram that uses standardized symbols to represent the components in an electric circuit and their connections o each other.
 Related terms Series circuit, Parallel circuit, electric circuit

Series Circuit
 A circuit where there is only one path in which the electrons can flow through.
 ex. This circuit is series, as there is only one path in which the electrons can flow through.
 Related termsparallel circuit, circuit diagram, electric circuit

Parallel Circuit
 A circuit where there is more than one path n which the electrons can flow through.
 ex. This circuit is a parallel circuit because there is more than one path in which the electrons can flow down.
 Related Terms Series circuit, Circuit diagram, electric circuit

Ohm's Law
 The ratio of potential difference to current is a constant called resistance.
 Related termsOhms

Superconductor
 A material where there is no resistance. The electric charge can flow with no resistance.
 ex. very cold mercury is a superconductor
 related termsResistance, Resistor

Nonohmic
 Does not follow ohms law.
 Related terms Ohm's law, Ohm

Loads in Series
 Loads on a series circuit.
 Related terms Loads in parallel, Series circuit

Loads in Parallel
 Loads on a parallel circuit.
 Related terms Loads in series, parallel circuit