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30 Cards in this Set

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  • Back
ammeter
An instrument that's used to measure electric current.
ampere
The basic unit of electric current in the metric sys; abrreviated A. one A= movement of one coulomb of charge per second
battery
A series of dry cells
cell
A devide that uses either a chemica charge to product electric energy or uses electric energy to make a chemical charge
charged
A word used to describe an object with more of one kind of elec. charge than other.
closed circuit
a continuous connection of conductors from one end of an electrical source to the other.
conductor
A substance through which electric charges can move easily
coulomb
a unit of electric charge equal to 6.25x10 to the 18th charges.
current
a movement of electric charges; usu. due to moving electrons
electricty
energy in the form of electrons that can move along a conductor, that can be changed into heat, light, mechanical or electrical charge
electroscope
a device used for detecting electrical charge.
filament
the small, fine wire inside a lightbulb
ground
an uncharged body that contains a large resevoir of electrons
induction
the process of charging an object by bringing it near a charged object
kilowatt-hour
=1000 kWh
negative terminal
the pt. f a dry cell or battery (having an excess of electrons)from which electrons leave
neutral
an object that has egual numbers of positive and negative charges
ohm
the SI unit of resis
open circuit
an incomp circ. due to break in continuous connection o conductors from one end of elec. source to other
parallel circuit
a circuit having two or more paths through which elec. can flow
positive terminal
the pt. of a dry cell or battery toward which electrons move
resistance
the measure of how hard it is for an elec. charge to move through a conductor
series circuit
an elec. circuit that contains a single path with no branches, so that the same current passes through all the conductors in the circuit
short circuit
a dangerous cond that results when the pt. of an elec. circuit with the most resis is bypassed
static charge
a positive or negative charge thats not moving
volt
the SI unit of voltage: V
voltage
the amount of energy supplier per unit of elec. charge by a cell or battery ("push" on ea. electron)
voltage drop
tge amount of energy removed per unit of elec. energy by passing through a conductor (or resis)
voltmeter
a device that measures voltage drop
watt
the basic unit of elec. power in the metric sys: abbreviated W