10A Section review Flashcards
What causes electrical charges to attract and repel?
Positive and negative charges.
How does the strength of this force compare to gravity?
It is stronger (static electricity on a comb overcomes gravity & picks up paper)
How many kinds of electrical charges are there?
Two
How do we know this?
Scientists never found a charge that repels or attracts both rubber & glass rods.
What are they called?
Positive and negative.
State the law of charges.
Law of charges says like charges repel each other and opposite charges attract each other.
Object A is +, Object B is +, do they repel or attract?
Repel
Object A is +, Object B is -, do they repel or attract?
Attract
Object A is -, Object B is -, do they repel or attract?
Repel
Object A is -, Object B is +, do they repel or attract?
Attract
What makes everyday objects electrically neutral?
When the object has the same number of electrons and neutrons.
What produces a negative charge on an object?
When an object has more electrons than protons.
What produces a positive charge on an object?
When an object has more protons than electrons.
How does the non-mathematical model in this chapter represent the presence, direction, & strength of electric fields?
A 2D model called “Lines of Force” with arrows showing direction and closer lines showing more force than lines farther apart.
As like charges move closer together, their lines of force bend farther away from each & push together into a smaller space. What does this indicate about the size of the forces between them?
They are strong.
