
Intro to Electrostatics
Presentation
•
Physics
•
11th Grade
•
Hard
Joseph Anderson
FREE Resource
9 Slides • 8 Questions
1
Quick Review of Key Topics
2
Exists between charged particles or charged objects
Can both ATTRACT and REPEL
Electrostatic Force
3
Friction
Conduction
Induction
ONLY ELECTRONS CAN BE TRANSFERRED!!
Objects become charged in three ways
4
Multiple Choice
Like charges __________ and opposite charges ________.
attract, repel
attract, attract
repel, attract
repel, repel
5
Multiple Choice
A material becomes negatively charged when...
It gains electrons
It loses electrons
It gains protons
It loses protons
6
Multiple Choice
Assume a rubber rod is rubbed against a rabbit fur and the rod gains 5 electrons. Which of the following is true?
The fur lost 5 electrons
the fur gained 5 electrons
the fur gained 5 protons
The fur lost 2 electrons
7
The leaves in an electroscope repel when charged objects are near
Electroscopes detect charge
8
Charged object touches a neutral conducting material
Electrons move until both objects have the same overall charge
Conduction
9
Charged object is brought nearby but NOT TOUCHING neutral conductor
Charges POLARIZE (separate)
Object gains opposite charge if grounded
Induction
10
Multiple Choice
A negatively charged rod is brought near a neutral electroscope, what happens in the electroscope?
Electrons move from the plate to the vein to make the vein negatively charged.
Protons move from the plate to the vein to make the vein positively charged.
Electrons move from the vein to the plate to make the vein positively charged.
Protons move from the vein to the plate to make the vein negatively charged.
11
Multiple Choice
A positively charged rod is brought near a neutral electroscope, what happens in the electroscope?
Electrons move from the plate to the vein to make the vein negatively charged.
Protons move from the plate to the vein to make the vein positively charged.
Electrons move from the vein to the plate to make the vein positively charged.
Protons move from the vein to the plate to make the vein negatively charged.
12
Multiple Choice
A negatively charged rod touches the plate of a neutral electroscope, what happens in the electroscope?
Electrons move from the rod to the plate and to the vein to make the vein negatively charged.
Protons move from the rod to the plate and to the vein to make the vein negatively charged.
Electrons move from the vein to the plate and to the rod to make the vein positively charged.
Protons move from the vein to the plate and to the rod to make the vein negatively charged.
13
Gravity can only attract; electric force can attract and repel
Gravity is weaker than the electric force which is very strong
Comparing force of gravitation and electric force
14
How would the electric force between two objects change if the quantity of one charge tripled?
15
How would the electric force between two objects change if the distance between them tripled?
16
Multiple Choice
What happens to the force between two charged objects when you double the distance between them?
it doubles
it is cut in half
it quadruples
it is cut by 1/4
17
Multiple Choice
If one of the charges doubles, what happens to the force?
it doubles
it gets cut in half
it quadruples
it is cut by 1/4
Quick Review of Key Topics
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