Physical Science Finals-Chapter 7
These are terms for Mrs.Dyer's final.
Terms
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- protons
- have positive electric charge
- parallel circuit
- contains two or more branches for current to move through
- amperes
- the units an electric currents is measured in
- charging by contact
- the process of transferring charge by touching or rubbing
- resistance
- the tendency for a material to oppose the flow of electrons
- voltage difference
- the force that causes charges to move
- series circuit
- the current only has one loop to flow through
- electric field
- where a lot of charges are placed and pulled or pushed
- insulators
- things that electrons do not move easily through like plastic, wood, rubber, or glue
- open circuit
- if any part of a series circuit is disconnected, no current flows through the circuit
- wet-cell battery
- contains two connected plates made of different metals in a conducting solution
- law of conservation of charge
- charge may be transferred from object to object, but it cannot be created or destroyed
- Ohm's law
- the current in a circuit equals the voltage difference divided by the resistance
- wall sockets
- have a voltage difference across the two holes of an electrical outlet, and a generator at a power plant provides this voltage differemce
- conductors
- things that electrons move more easily through like metals
- circuit
- a closed path in which charges flow
- electrons
- have negative electric charge
- like charges
- repel
- opposite charges
- attract
- electric current
- the flow of charges through a wire or conductor
- dry-cell battery
- produces a voltage difference between its zinc container and its carbon suspension rod, causing current to flow between them
- charging by induction
- the rearrangement of electrons on a neutral object caused by a nearby charged object
- electroscope
- a tool that detects the presence of electric charges
- volts
- the units a voltage difference is measured
- grounding
- using a conductor to direct an electric charge into the ground
- static electricity
- the accumulation of excess electric charge on an object