physics

electric field

electric field

is a property of the space around a charged object that exerts forces on other charged objects

electric field line

indicates the direction of the force due to the electric field on a positive test charge

electric potential difference

is the work needed to move a positive test charge from one point to another

volt

one joule per coulomb is called

equipotential

whenever the electric potential difference between two or more positions is zero

capacitor

smaller devices used to store electrical energy

capacitance

the slope of the line of a net charge versus potential difference graph

electric current

a flow of charged particles

conventional current

is the direction in which a positive test charge moves

battery

several galvanic cells connected together

electric circuit

any closed loop or conducting path allowing electric charges to flow

ampere

a flow of electric charge equal to one coulomb per second

resistance

the measure of how strongly an object or a material impedes current produced by a potential difference

resistor

is a device designed to have a specific resistance

parallel connection

ay time the current has two or more paths to follow in a circuit

series connection

a connection with only on current path in a circuit

superconductor

is a material with zero resistance

kilowatt hour

is equal to 1000watts delivered continuously for 3600s

series circuit

there is only on path for the current

equivalent resistor

a single resistor that resulted in the same current

voltage divider

produces a source of potential difference that is less that the potential difference across the battery

parallel circuit

a circuit in which three are several current paths

short circuit

when a circuit with a very low resistance is formed

fuse

is a short piece of metal that acts as a safety device by melting and stopping the current when too large a current passes thorugh it

circuit breaker

is an automatic switch that acts as a safety device by stopping the current if the current gets too large and exceeds a threshold value

ground fault interrupter

is a device that contains an electronic circuit that detects small current differences between two wires in the cord connected to an appliance

combination series parallel circuit

a circuits that includes series and parallel branches

polarized

they have 2 opposite ends, called poles

domain

is a group of neighboring atoms whose poles are aligned

magnetic fields

are fields that exist in space where magnets would experience a force

magnetic flux

the number of magnetic field lines passing through a surface perpendicular to the lines

electromagnet

is a magnet whose magnetic field is produced by electric current