amount of charge
electroscope
attract
increase
conduction
induction
contact forces
law of static charge
decrease
neutral
distance between objects
repel
electric force
type of charge
填空题
1A(n) _______ is a push or pull between charged objects.
2The ________state that like charges_______ and opposite charges _______.Charged objects are attracted to ________objects.
3The electric force that acts on any pair of objects depends on the ______and_______ on the objects and on the ________.
4If you increase the amount of charge on objects , you_______ the electric force .if you _______ the distance between objects,you decrease the electric force .
5 A device that can detect the presence of charge is the ______.
6 If the leaves of an electroscope become charged ,they will_____each other.
7 If a chargedrod is brought close to an electroscope and then removed ,the electroscope will become _________.
8 Charging by ________occurs when objects touch and an electric charge is transferred from one object to the other.A(n)______can be used to demonstrate this.
9 Charging by ________ occurs when objects are charged without touching.A(n)_______can be used to demonstrate this .
10 Neutral objects are attracted to charged objects because they are charge by ______.
希望路过的兄弟姐妹们能帮忙花点心思和时间帮帮小女子
小女子实在是难以understand这些问题，还有quiz等着俺去应付
所以`~~~~~~先谢谢大家乐~~
