click below
click below
Normal Size Small Size show me how
Physical Science 10
| Question | Answer |
|---|---|
| Electricity | movement of electrons |
| Static electricity | accumulation of extra electric changes on an object |
| Law of charges | opposites attract; like charges repel and unlike charges attract |
| Charging by friction | (contact) materials with a weak affinity for electrons can easily lose electrons by friction or simple rubbing |
| Charging by induction | creating a temporary charge on an object by exposing it to a charged object |
| Circuit | closed pat that electric current follows |
| Voltage | potential electrical energy |
| Current | amount of electrons flowing through the wire |
| Resistance | friction force on the electron flow |
| Battery | source of electricity that provides electrons from a chemical reaction (acts as an “electron pump”) |
| Dry cell battery | electrons flow from the zinc container through a circuit and back to the carbon rod in the center of the battery |
| Wet cell battery | contains two plates of different metals (lead and lead dioxide) in a conducting solution (sulfuric acid) |
| Generator | uses electrical and magnetic energy for continuous electricity (AC or DC) and is powered by wind/water/ |
| Electrostatic force | a field force created by the attraction or repulsion of opposite charges |
| Conductors | have little resistance to electron motion and allows electrons to move easily. |
| Insulators | have high resistance of electron motion and does not allow electrons to move easily. |
| Semiconductors | allows limited electron flow only under certain conditions |
| Sink | electrical ground or something that “absorbs” the electrons |
| Series circuit | have loads connected right after another and has a single path. If one load goes out they all go out |
| Parallel circuit | have the loads connected in separate branches and has multiple paths. If one load goes out the others still work |
| Electrical charges (6.24 x 10 to the 18th electrons) | coulombs |
| Voltage potential difference | volts |
| Current | amps (amperes) |
| Resistance | ohms |
| Power | watts |
| P | V*I |
| V | I*R |