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electricity work

chapter 13

QuestionAnswer
What is the electric charge of protons? positive
What is the electric charge of electrons? negative
What is the charge if the charges of protons and electrons cancel each other out? no net charge
What is the accumulation of excess electric charges on an object? static electricity
What says a charge may be transferred from object to object, but never created or destroyed? Law of conservation of charge
In electricity, what do opposites do? attract
In electricity, what do likes do? repel
What states that forces decrease as they get more distant? Coulomb's Law
What are materials allow electrons to move easily through? conductors
What materials inhibit or slow electron movement? insulators
Give an example of a good conductor. metals
Give some examples of good insulators. plastic, wood, rubber, glass, air
what are 2 ways to transfer electric charge? conduction and induction
What is charging by conduction? transferring charge by touching or rubbing
What is an example of charging by conduction? rubbing the carpet
What is charging by induction? rearrangement of electrons on a neutral object caused by a near charged object.
What is an example of charging by induction? a negatively charged balloon near your sleeve causes an area of your sleeve to become positively charged.
What is a transfer of charge through the air due to static electricity? static discharge- lightening
What is used to detect the presence of electric charges? electroscope
What is the flow of charges through a wire or conductor? electric current
What changes chemical energy to electrical energy? batteries
What are machines that make electrical energy from some other kind of energy? generators
What is an unbroken path through which electric current flows? circuit
Created by: gretzinger
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