# electricity 2

 Electric circuit A closed path along which electrons that are powered by an energy source can flow.  Voltaic cell A source of energy that genreates an electric current Battery A connection of two or more cells Electrode one of two metal terminals in a cell or battery electrolyte a solution or paste that conducts charge dry cell a cell that contains an electrolyte made of a paste wet cell A cell that contains a liquid electrolyte  primary cell A cell that can be used only once Secondary cell A cell that can be recharged Fuel cell A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell Solar cell A cell that converts sunlight into electrical energy Terminal A position on a cell that must be connected to other components to form a circuit Switch A control device that can complete or break the circuit to which it is connected Open circuit A circuit that contains a gap or breakHappens if the switch is open  Electric current The measure of charged particles that pass by a point in an electric circuit each secondMeasured with an ammeter in ampheres (A) Coulomb (C) the quantity of charge that is equal to the charge of 6.25 x 10^18 electrons Amphere (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 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 componenets 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 along which electrons can 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 amphere ( V/A ) Superconductor A material through which electric charge can flow with no resistance Non-ohmic not following Ohm's law Load in series Loads that are all connected together to the same wires  Rtotal = R1 + R2 + R3 I total = I1= I2 = I3V total = V1 + V2 + V3 Loads in parallel Loads that are not all connected to the same wire , and there is more than one path which electrons can flow VT = V1 = V2 = V3IT = I1 + I2 + I3RT < R1 ; RT < R2 ; RT Authorbijaldesai ID180386 Card Setelectricity 2 Descriptionchapter 11 Updated2012-10-31T22:56:09Z Show Answers