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6th gr Electricity

6th Grade Electricity

What makes up matter? atoms
What are atoms made of? protons (positive charge), neutrons (neutral charge) and electrons (negative charge)
physical property that describes how charged objects interact with exah other charge
A charge can be either positive or negative
like charges repel and opposite charges attract Law of Electric Charges
Force between charged objects electric force
What is electric force determined by? Size of charges and distance between charges
Region around a charged particle that can exert a force on another charged object electric field
Three ways to make a charge Friction, conduction and induction
rubbing objects cause friction to be wiped from one object and transferred to another object friction
Electrons are transferred from one object by direct contact conduction
Charges in an uncharged object are rearranged without direct contact with charged object induction
Glass flask with metal rod inserted through rubber stopper and two metal leaves at the bottom of rod, leaves hang straight down when not charged, spread apart when charged electroscope
Material that charges can move easily conductors
Examples of conductors most are metals (copper, silver, aluminum), tap water
Materials that charges cannot move easily insulators
Examples of insulators plastic, rubber, glass, wood, air
device that uses electrical energy load
used to open or close circuit switch
Circuit that all parts are connected in a single loop series circuit
circuit where different loads are located in different branches parallel circuit
Are most circuits series or parallel parallel
Switch that automatically opens if the current in the circuit is too high circuit breaker
Complete, closed path through which electric charges flow circuit
4 parts of a circuit energy source, load, wires, switch
Contains thin strip of metal through which charges form a circuit flow fuse
several circuits that connect lights, appliances and outlets through a building, circuits branch from fuse box or breaker box household circuits
when charges bypass the loads in circuit, resistance drops and current is increased circuit failure
Failed circuits = fire
Mini circuit breakers which are outlets in home near water GFCI
German school teacher who determined relationship between current, voltage and resistance Georg Ohms
What is the equation for Ohm's Law? I=V/R
Symbol for current I
Unit for current Amps (A)
Symbol for voltage V
Unit for voltage Volts (V)
Symbol for resistance R
Unit for resistance Ohms
Rate at which electrical energy is used to do work power
Unit for power Watt (W)
What is the equation for power? P=V*I
What does eletrical energy measure amount of eletricity used
Equation for eletrical energy E=P*t
symbol for electrical energy E
unit for eletrical energy (Kilowatt hour (HWh)
symbol for power P
Unit for power KW or W
symbol for time t
unit for time h (hour)
rate at which charges pass a given point current (symbol = I) unit = amps
rate at which electrical energy is used to do work power (symbol = P) unit = watt
what is potential difference voltage (energy per unit charged)
Created by: scoops on 2012-03-25

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