# Chapter 11 glossary terms electricity unit

 Electric circuit A closed path along which electrons that are powered by an energy source can flow. e.g: A light bulb is a component that is powered by an electric circuit. Voltaic cell A source of energy that generates electric current  by chemical reactions involving two different metals or metal compounds separated by a solution that is a conductor. e.g: A light bulb Battery A connection of two or more cells. Electrode One of two metal terminals in a cell or battery. e.g: positive terminal, negative terminal Electrolyte A solution or paste that conducts charge. e.g: moist paste in a cell (battery) Dry cell A cell that contains an electrolyte that is a paste. Wet cell A cell that contains a liquid electrolyte. Primary cell A cell that can only be used once. e.g: a AA battery Secondary cell A cell that can be recharged. e.g: a cell phone Fuel cell A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell. e.g: a fuel cell car Solar cell A cell that converts sunlight into electrical energy. e.g: a solar panel Terminal Location on a cell that must be connected to other components to form a circuit. e.g: a positive terminal and a negative terminal Switch A control device that can complete or break the circuit it is connected to. e.g: a light switch Open circuit A circuit that contains a gap or break. Electric current The rate of movement of electric charge e.g: Amperes Coulomb (C) The quantity of charge equal to the charge of 6.25x10^18. Ampere (A) The unit of electric current, equivalent to one coulomb per second. Electrical resistance The property of a substance that hinders electric current and converts electrical energy to other forms of energy. Resistor a device used in an electric circuit to decrease the current through a component by a specific amount. Load A resistor or any other device that transforms electrical energy into heat, motion, sound, or light. e.g: a microwave Potential difference (voltage) The difference between the electric potential energy per unit of charge at two points in a circuit. Volt The unit for potential difference, equivalent to one joule (J) per coulomb (C). Circuit diagram A diagram that uses standard symbols to represent the components in an electric circuit and their connections. Series circuit A circuit in which there is only one path along which electrons can flow. Parallel circuit A circuit in which there is more than one path for electrons to flow. Ohm’s law The ratio of potential difference to current is a constant called resistance. Ohm (Ω) The unit for resistance, equivalent to one volt per ampere (V/A) Superconductor A material through which electric charge can flow with no resistance. e.g: aluminum Non-ohmic Not following Ohm’s law. Authorc_hockey ID286428 Card SetChapter 11 glossary terms electricity unit Descriptionchapter 11 Updated2014-10-20T22:05:04Z Show Answers