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31 Cards in this Set
- Front
- Back
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When charged particles do not move, we call this.... |
static electricity
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___________ are particles made of negative charge
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Electrons
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When we charge something by rubbing objects together, we say this is charging by....
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friction
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When negative charges are pulled away, it leaves ______ charges behind on the other object.
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positive
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A positive charge can result from an excess of ______ if electrons are removed.
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protons
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An unaltered atom has an equal number of ___& _____ resulting in a neutral atom.
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positives & negatives or
protons & electrons |
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If two negatively-charged balloons are brought near each other, then they will .....
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repel
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If two positively-charged balloons are broght near each other, then they will....
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repel
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If a postively-charged balloon is brought near a negatively-charged balloon, then they will....
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attract
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If two uncharged balloons are brought near each other, then ...
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they will neither attract nor repel.
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Just like magnets, objects with a static charge develop an ____ _____ around them, that acts much like a magnetic field.
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electric field
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Electric charges can flow easily through a .....
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conductor
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Electrical conductors are typically made of ....
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metals
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A non-conductor is called an....
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insulator
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Insulators are typically made of materials such as....
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glass, plastic, rubber, & dry wood
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When a charged object's electric field causes electrons to shift in another object in close proximity, we call this charging by.....
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induction
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An e_________ is a device with 2 foil leaves that move when it detects a static charge.
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electroscope
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When a charged object actually touches an uncharged object or if a spark jumps from one object to another, we call this charging by....
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conduction
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A gigantic spark in the atmosphere during a storm is called....
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lightning
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A spark between two objects is also called an e___ d____.
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electric discharge
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If 200 negatives (electrons) are ripped off your hair by a balloon, then ____ positives (protons) must remain behind, because of the law of conservation of charge.
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200
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Rubbing a balloon on your hair to charge it is called charging by...
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friction
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Sticking a charged balloon to an uncharged wall in the classroom is called charging by....
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induction
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If negative charges are attracted to one side of an object because a positively charged object is brought near, then the other side of the object has a build-up of ____ charges. This process is called....
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positive
induction |
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The leaves on an electroscope separate because "like" charges cause them to _____.
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repel
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What happens to the gold foil leaves when the negatively-charged balloon is brought near the electroscope?
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The leaves separate. This is charging by INDUCTION.
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What happens to the gold leaves when a positively-charged balloon is brought near the electroscope?
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The leaves separate. This is charging by INDUCTION.
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What happens to the gold leaves when a negatively-charged balloon actually touches the electroscope?
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The leaves separate. This is charging by CONDUCTION.
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What do these balloons do when brought near each other?
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They attract each other.
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What happens when these two balloons are brought near each other?
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They repel each other.
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What happens when these two balloons are brought near each other?
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They repel each other.
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