AP Physics 2 : Electrostatics
Study concepts, example questions & explanations for AP Physics 2
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Example Questions
Example Question #91 : Electricity And Magnetism
A test charge of 
None of these
The definition of electric force on a charge in an electric field is:
Example Question #41 : Electrostatics
A test charge of 
None of these
The definition of electric force on a charge in an electric field is:
Example Question #14 : Electric Force In An Electric Field
Determine the force on a point charge of 
None of these
Use the following form of the electric force equation:
Plug in values:
Example Question #41 : Electrostatics
An object deep in space of mass 
Use the following equation for electric force:
Plug in values:
Example Question #101 : Electricity And Magnetism
A 
Using 
Combining equations:
Solving for
Converting 
Example Question #42 : Electrostatics
An observer is 
It will decrease in magnitude and have constant direction
It will increase in magnitude and flip directions
None of these
It will flip directions constantly
It will increase in magnitude and have constant direction
It will increase in magnitude and have constant direction
As one moves closer to a negative charge, the electric field increases in the direction of the negative charge.
Example Question #751 : Ap Physics 2
Suppose I have a uniform electric field within a parallel plate capacitor with field strength of 
Suppose the capacitor's plates are 
Determine the magnitude of force experienced by an individual electron placed in this field and the direction. Assume the charge of an electron is
Recall that the formula for the magnitude of force 
Where 
Since the electric field strength is constant,
To determine direction, remember that electrons will move towards the positively charged plates since electrons are negatively charged.
Example Question #43 : Electrostatics
An electron is moved in a perfect circle, with a negative point charge in the center. Determine the work done by the negative point charge.
No work done
Negative work done
Positive work done
Infinite work done
Impossible to determine
No work done
There will be no work done. The point charge at the center is emitting an electric field towards itself. If the electron is moved in a circle around it, it will have moved perpendicular to the force the entire time, and thus no work has been done.
Example Question #1 : Electric Force Between Point Charges
Two charges are placed a certain distance apart such that the force that each charge experiences is 20 N. If the distance between the charges is doubled, what is the new force that each charge experiences?
There is no way to determine the new force
To solve this problem, we'll need to utilize the equation for the electric force:
We're told that the force each charge experiences is 20 N at a certain distance, but then that distance is doubled. Thus, the new electric force will be:
Example Question #2 : Electric Force Between Point Charges
What is the force experienced by a 
The point charge experiences no force
The equation to find the force from two point charges is called Coulomb's Law.
In this equation, 
Now, we just plug in the numbers. Note: the charge values are in microcoulombs (the Greek letter 
Therefore, the force experienced on either charge is 0.216N of force.
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