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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 |