# Shared Flashcard Set

## Details

Electricity and Currents
Ms. King's Physics
52
Physics
04/30/2012

Term
 Ammeter
Definition
 device to measure electrical current
Term
 Ampere
Definition
 unit of electric current; one ampere is the flow of one coulomb of charge per second
Term
 Battery
Definition
 device that converts chemical to electrical energy consisting of two dissimilar conductors and an electrolyte
Term
 Capacitor
Definition
 electrical device used to store charge and energy in the electrical field
Term
 Charged
Definition
 object that has an unbalance of positive and negative electrical charges
Term
 Charging by conduction
Definition
 process of charging by touching neutral object to a charged object
Term
 Charging by induction
Definition
 process of charging by bringing neutral object near charged object, then removing part of resulting separated charge
Term
 Coulomb
Definition
 unit of electrical charge. Charge caused by flow of one ampere for one second
Term
 Diode
Definition
 electrical device permitting only one way current flow
Term
 Dopants
Definition
 small quantities of material added to semiconductor to increase electrical conduction
Term
 Electrical charge pump
Definition
 device, often a battery or generator, that increases potential of electrical charge
Term
 Electrical circuit
Definition
 continuous path through which electrical charges can flow
Term
 Electrical current
Definition
 flow of charged particles
Term
 Electrical field
Definition
 property of space around a charged object that causes forces on other charged objects
Term
 Electric potential
Definition
 ratio of electric potential energy to charge
Term
 Electric potential difference
Definition
 difference in electric potential between two points
Term
 Electric potential energy
Definition
 energy of a charged body in an electrical field
Term
 Fuse
Definition
 metal safety device in an electric circuit that melts to stop current flow when current is too large
Term
 Galvanometer
Definition
 device used to measure very small currents
Term
 Grounding
Definition
 process of connecting a charged object to Earth to remove object's unbalanced charge
Term
 Insulator
Definition
 material through which the flow of electrical charge carriers or heat is greatly reduced
Term
 Ohm
Definition
 SI unit of resistance, one volt per ampere
Term
 Ohm's law
Definition
 resistance of object is constant, independent of voltage across it
Term
 Parallel circuit
Definition
 circuit in which there are two or more paths for current flow
Term
 Parallel connection
Definition
 connection of two or more electrical devices between two points to provide more than one current path
Term
 Photovoltaic cell
Definition
 device that converts electromagnetic radiation into electrical energy
Term
 Piezoelectricity
Definition
 electric potential produced by deforming material
Term
 Potential difference
Definition
 difference in electric potential between two points
Term
 Potentiometer
Definition
 electrical device with variable resistance; rheostat
Term
 Resistance
Definition
 ratio of potential difference across device to current through it
Term
 Schematic diagram
Definition
 representation of electric circuit using symbols
Term
 Semiconductor
Definition
 material in which electrical conduction is smaller than that in a conductor, but more than in an insulator
Term
 Series circuit
Definition
 circuit in which electrical current flows through each component, one after another
Term
 Short circuit
Definition
 low resistance connection between two points, often accidental
Term
 Step-down transformer
Definition
 transformer with output voltage smaller than input voltage
Term
 Step-up transformer
Definition
 transformer with output voltage larger than input voltage
Term
 Superconductor
Definition
 electrical conductor that has no resistance and low temperatures
Term
 Test charge
Definition
 charge used, in principle, to measure electric field
Term
 Transformer
Definition
 device used to transform energy from one electrical circuit to another by means of mutual inductance between two coils
Term
 Transistor
Definition
 semiconductor device that controls large current by means of small voltage changes
Term
 Electromagnet
Definition
 device that uses an electric current to produce a concentrated magnetic field
Term
 Electromagnetic force
Definition
 one of the fundamental forces due to electric charges, both static and moving
Term
 Electromagnetic induction
Definition
 production of electric field or current due to change in magnetic flux
Term
 Electromagnetic waves
Definition
 wave consisting of oscillation electric and magnetic fields that move at the speed of light through space
Term
 Electromotive force
Definition
 potential difference produced by electromagnetic induction
Term
 Ferromagnetic materials
Definition
 material in which large internal magnetic fields are generated by cooperative action of electrons
Term
 Lodestone
Definition
 naturally occurring magnetic rock
Term
 Magnetic field
Definition
 space around a magnet throughout which magnetic force exists
Term
 Right-hand rules
Definition
 used to find force on current or moving particle in magnetic field; used to fine direction of magnetic field caused by current or of induced EMF
Term
 Electric Field lines
Definition
 lines representing the direction of electric field
Term
 Series connection
Definition
 arrangement of electrical devices so that there is only one path through which current can flow
Term