Electricity Chapter 6

series curcuit

a circuit with only one path for current to follow

electric circuit

a closed path that electric current follows

electroscope

a device that can detect electric charge

insulator

a material in which electrons are not able to move easily.

conductor

a material through which electrons move easily

static electricity

an accumulation of excess electric charge

parallel circuits

contain two or more branches for current

charging by contact

process of transferring charge by touching or rubbing

increases

resistance _________ as current decreases

law of conservation of energy

states that electric charge cannot be created or destroyed

Ohm's law : I=V/R

the current in a circuit equals the voltage difference divided by the resistance

charges and separation

the electric force between two charged objects depends on what?

voltage

the electric force that makes charge flow in a circuit is related to this

electric current

the net movement of electric charges in a single direction

electrical power

the rate at which appliances convert electrical energy into other forms of energy

charging by induction

the rearrangement of electrons on a neutral object caused by a nearby charged object

resistance

the tendency for a material to resist the flow of electrons and to convert electrical energy into other forms of energy

kilowatt-hour

unit for electrical energy

glass, plastic

what are good insulators

metals

what are the best conductors?

wires

what does not provide a significant voltage difference in a circuit?

V=IR

what expresses the relationship between voltage, current and resistance?

P=IV

what expresses the relationship between voltage, current, and electrical power?

rubbing a balloon on wool

what is an example of charging by contact?

electric field

what surrounds every electric charge and exerts the force that causes other electric charges to be attracted or repelled?