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science chapter 20


electric force the attraction or repulsion between electric charges
electric field the region around a charged object where the object's electric force interacts with other charged objects
static electricity a buildup of charges on an object
conservation of charge the law that states that charges are neither created nor destroyed but only transferred from one material to another
friction the force that one surface exerts on another when the two surfaces rub against each other
conduction the transfer of heat from one particle of matter to another
induction a method of charging an object by means of the electric field of another object
static discharge the loss of static electricity as electric charges transfer from one object to another
electric current the continuous flow of electric charges through a material
electric circuit a complete, unbroken path through which electric charges can flow
conductor a material that conducts heat well
insulator a material that does not conduct heat well
voltage the difference in electrical potential energy between two places in a circuit
voltage source a device that creates an electrical potential energy difference in an electric circuit
resistance the measurement of how difficult for charges to flow through a material
chemical energy a form of potential energy that is stored in chemical bonds between atoms
chemical reaction the process in which substances undergo chemical changes that result in a formation of new substances
electrochemical cell a device that transform chemical energy into electrical energy
electrodes a metal strip that conducts electricity
electrolyte a liquid or paste that conducts electric current
terminal the point at which a conductor from an electrical component, device or network comes to an end.
battery device consisting of one or more electrochemical cells
wet cell An electric cell in which the chemicals producing the current are in the form of a liquid.
dry cell a type of electric battery in the form of paste
Ohm's law the definition of what electrical resistance is.
resistance= voltage --------- current
voltage= current x resistance
series circuit an electric circuit with a single path
ammeter an instrument for measuring electric current especially in amperes.
parallel circuit electrical circuit where the current branches out and flows into more than one electrical device
voltmeter a device used to measure voltage, or electrical potential energy difference
power current or the flow of electric charge and voltage or the potential of charge to deliver energy
power= voltage x current
energy= power x time
short circuit A low-resistance connection between two points.
grounded to create less noise and to help with surge protection.
third prong the end of a bonding conductor.
fuse a safety device with a thin metal strip that will melt if too much current passes through a circuit
circuit breaker a reusable safety switch that breaks the circuit when the current becomes too high
point Electrical power Power consumption. A power point is an electrical socket on a wall.
Created by: 088103