Chapter 11 Review

 Electric Circuit A closed path along which electrons that are powered by an energy source can flow. Voltaic Cell A source of energy that generates an electic current by chemical reactions invloving two different metals or metal compounds separated by a conducting solution 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 chargee.g. acetic acid Dry Cell A cell that contains an electrolyte made of a paste Wet Cell A cell that contains an electrolyte made of a liquid 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 energye.g. a solar panel Terminal A position on a cell that must be connected to other components to form a circuit Switch A control device that can be complete or break the circuit it is connected to Open Circuit A circuit that contains a gap or break Electric Current A measure of the number of charged particles that pass by a point in an electric circuit each second Measured in Amps(A)Symbol:I Coulomb (C) The quantity of charge that is equal to the charge of 6.25 x 1018 Ampere (A) The unit of electric current, equivalent to 1 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 circuitMeasured in Volts(V)Symbol:V 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 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 ampere (V/A)Measured in Ohms(Ω)Symbol:R Superconductor A material through which electric charge can flow with no resistance Non-ohmic Not following ohm's law Loads In Series The current is the same at any point and the potential difference of the loads will always add up to the potential difference across the cell.VT=V1+V2+V3IT=I1=I2=I3RT=R1+R2+R3 Loads in Parallel VT=V1=V2=V3IT=I1+I2+I3RT