Show:
Define
Charges
Conductors and Laws
100
What is a static charge?
A static charge is an electric charge at rest.
100
What are three ways in which an object can become electrically charged?
What is induction,conduction and friction
100
What type of material is a very good conductor?
What is Metals
200
Define electric force
The electric force is the force that exists between static charges
200
Explain how an object becomes charged by friction. Give an example.
Charging by friction occurs when two objects are rubbed together. For example, large amounts of electric charge build up on clothes as they tumble against each other in a dryer.
200
Explain why grounding an object makes the object neutral.
Grounding an object becomes neutral because all the excess charges are removed, or discharged.
300
What is electrostatics?
What is the study of static electric charge
300
Explain charging by conduction.Give an example.
Charging by conduction occurs when two objects touch and an electric charge is transferred from one object to the other for example, if you walk across a carpet and get a spark by touching a metal doorknob then you are charging by conduction
300
Who is Charles Coulomb and what is the named in his honour
What is a french physicist , who was the first person to recognize relationships between electric force,size of charge and distance. The SI unit for size of electric chare is called (C) in his honour.
400
What is the law of electric charge?
What is that like charges repel and unlike charges attract.
400
What type of charge will amber acquire when it is rubbed with a nylon cloth?
What is amber will most probably gain electrons and the nylon will lose electrons.
400
If you put your hand near a van de graff generator, a spark may jump to your hand from the generator. Is air a conductor or insulator?Explain.
Air is an insulator.
500
Define an insulator
What is a substance in which the electrons are so tightly bound to the atoms making up the material that they are not free to move to a neighbouring atom.
500
How would you determine whether the static charge on a sock from a clothes dryer is positive and negative?
If the charge is alike then they will not cling but if the charges are opposite then the socks will join.
500
What is Coulombs law?
What is The strength of the electric force increases with increasing electric charges and decreases with the increasing distance.