| A | B |
|---|
| potential difference | the force that causes electrical charges to flow |
| current | the flow of electrons through a conductor |
| the unit for potential difference | volts |
| the unit for current | amperes/amps |
| circuit | a closed path through which electrons flow |
| batteries | these devices produce electrons through chemical reactions |
| the potential difference in US wall sockets | 120V |
| the tendency for a material to oppose the flow of e- | resistance |
| the unit for resistance | ohms |
| voltage is a measure of this | the 'push' for electrons |
| the symbol for current | I |
| the symbol for voltage | V |
| the symbol for resistance | R |
| the battery that has a liquid electrolyte | wet cell |
| the battery that has a paste electrolyte | dry cell |
