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?