electricity Flashcards
(20 cards)
state electricity
the accumulation of access electric charge on an object
law of conservation of charge
charge can be transffered from object to object, but he cannot be created or destroyed
conductor
a material in which electrons are able to move easily
insulator
a material in which electrons are not able to move easily
charging by contact
the process of transferring charge by touching or rubbing
charging by induction
the rearrangement of electrons on a neutral object caused by a nearby charged object
electric current
the net movement of electric charges in a single direction
voltage difference
related to the force that causes electric charges to flow
circuit
a closed path that a electric current follows
resistance
the tenancy for a material to oppose the flow of electrons
ohm’s law
the current in a circuit equals the voltage difference divided by the resistance
series circuit
the current only has one loop to flow through
parallel circuit
contain two or more branches for current to move through
electric power
the rate at which electrical energy us converted to another form
wet- cell battery
contains two connected plates made if different metals
dry- cell battery
two electrodes surrounded by a material called electrolyte
fuse
a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level
circuit breaker
an automatic device for stopping the flow of current in an electric circuit as a safety measure
watts
the SI unit of power
amperes
the SI unit of electric current
