| A | B |
|---|
| static electricity | excess charge on an object caused by an exchange of electrons |
| law of conservation of charge | charge can be transferred but not created or destroyed |
| conduction | move charge by bumping of molecules by contact |
| friction | movement of charge by rubbing |
| induction | like charges are repelled causing opposite charges to appear on the surface and be attracted |
| like charges | attract |
| unlike charges | repel |
| protons have a ________ charge | positive |
| electrons have a _________ charge | negative |
| electroscope | used to detect an electric charge |
| electric current | flow of electrons through a circuit from high voltage to low voltage |
| amperes | the unit used to measure current (the symbol is an A) |
| voltage difference | the force that causes a current to flow |
| volts | the unit used to measure voltage difference (potential difference), the symbol is a V |
| circuit | a closed path through which electric current can flow |
| series circuit | the electricity has one path to flow through (each additional switch or bulb in the circuit increses resistance) |
| parallel circuit | the current has two paths to flow through (houses are wired this way) |
| things that increase resistance | longer wire, thinner wire, |
| resistance | the opposition to the flow of charge |
| ohms | the unit used to measure resistance (the symbol is the omega) |
| Ohm's Law | Voltage = Current times Resistance or V=IR |
| conductor | a material in which electrons move easily |
| insulator | a material in which electrons are not able to move easily |
| lightning | an example of static discharge |
| grounding | a path that allows a static discharge to reach the earth (protects electronic equipment, circuits, etc.) |
| battery flow | electrons flow from the negative terminal to the positve terminal |
| the formula to compute Voltage | V=IR |
| the formula to compute Current | I = V/R |
| the formula to compute Resistance | R = V/I |
| the formula to compute Power | P = IV |
| power | the rate at which electrical energy is converted to another form of energy |
