Yufgv Flashcards
(18 cards)
Define static electricity
A stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair
Define electroscope
A device for detecting the presence of an electric charge
Define charge by friction
A process in which objects are made from different materials rub against each other, producing a net static charge on each other
Define insulator
A material in which electrons cannot move easily from one atom to another
Define conductor
A material in which electrons can move easily between atoms
Define charge by contact
Generating a net charge on a neutral object by touching it with a charged object
Define induced charge separation
The movement of electrons in a substance caused by the electric field of a nearby charged object that is not in direct contact with the object
Define ground
An object that can supply a very large number of electrons to, or can remove a very large amount of electrons from a charged object, thus neutralizing the object
What are the laws of electric charges
Things that have the same charge push each other away, things that have opposite charges attract each other, the total charge on a closed system is conserved! We can move charge around, but we can’t create it destroy it
What creates the charge difference on objects
The difference in electrons
Explain how the balloon from our experiment sticks to the wall
The balloon became negative because we rubbed it on our hair and the electrons from our hair went to the balloon and negatives(the balloon) and neutrals (the wall) attract(also explain molecules)
What are the three ways to charge
Friction, charge by contact, induced charge separation
How does charging by contact work
You transfer electrons from a charged object to a neutral one (or vise-versa)
What is the law of conservation of charge
the net charge of an isolated system will always remain constant.
What’s the difference between the electrons in an insulator vs a conductor
Conductors allow electrons to move easily, the electrons in an insulator are tightly bound to the atoms that make up the material
What’s the difference between a good conductor and a fair conductor
Good conductors alle electrons to move with ease, fair conductors allow electrons to move through them with some difficulty
Where do conductors get used
Wires, computers, electric fences
Where do insulators get used
If you wanted heart of electricity to stay in a certain place without moving (thermoses, the outside of wires)
