WorksheetsAP Physics 2 Electrostatics
Total questions: 20
Worksheet time: 3600secs
Two electrons are 1 nm apart. Estimate and compare the gravitational force between the electrons to the electric force between the electrons.
The gravitational force is much stronger.
The two forces are about the same magnitude.
The electric force is much stronger.
There is no gravitational force between them.
The gravitational force be confidently ignored when dealing with atomic size particles because:
It is many orders of magnitude greater than the electric force.
It is many orders of magnitude smaller than the electric force.
There is no gravitational attraction between atomic masses.
Two small aluminum foil balls of equal mass, A and B, have electric charges +q and +3q, respectively. Compare the magnitude of the electric force that the foil ball A exerts on B to the magnitude of the electric force that foil ball B exerts on A.
It is 3 times smaller.
It is the same.
It is 3 times larger.
Not enough information is given to determine the answer.
The electric potential energy of a system with two charged point-like objects is:
Proportional to (q12).
Proportional to (G).
Proportional to (1/r).
Proportional to (1/r2).
If two charged point-like objects have electric potential energy U, and the distance between them is doubled, the electric potential energy is:
Quartered
Halved
Doubled
Quadrupled
Based on this graph of the electric potential energy of two objects, what can you conclude about those two objects?
The two objects have the same type of charge.
The two objects have unlike charges.
Only one of the two objects is charged.
There isn't enough information in the graph to reach any of these conclusions.
Which of the following processes is a result of electric forces?
Hair standing on end when a person touches a Van de Graaff generator
Toner particles creating an image in a photocopier
A Wimshurst machine creating sparks in the air
All the answers
A plastic rod is rubbed with a piece of wool. During the process the plastic rod acquires a negative charge and the wool
acquires an equal positive charge
acquires an equal negative charge
acquires less in magnitude positive charge
acquires less in magnitude negative charge
A neutral conducting sphere A is placed on an insulating table. Which of the following will cause the sphere to gain positive charge?
Touch the sphere with a negatively charged rod
Touch the sphere with a positively charged rod
Bring a negatively charged rod near the sphere and briefly touch the sphere with a grounding wire
Bring a positively charged rod near the sphere and briefly touch the sphere with a grounding wire
Two electrons are separated by a distance r. Which of the following statements is correct?
There is an attractive electrostatic force between the electrons
There is a repulsive electrostatic force between the electrons
The gravitational force between the electrons much greater than electrostatic force
The electrostatic force is much greater than gravitational force
Two isolated charges, + 2q and ‑5q, are 2 centimeters apart. If F is the magnitude of the force acting on charge ‑5Q, what are the magnitude and direction of the force acting on charge + 2q ?
(1/2) F Toward charge ‑5q
2 F Away from charge ‑5q
F Toward charge ‑5q
F Away from charge ‑5q
A conducting sphere is charged with a negative charge –Q. Which statement about the charge distribution is correct?
Charge is concentrated at the center of the sphere
Charge is concentrated at the bottom part of the sphere
Charge is evenly distributed throughout the volume of the sphere
Charge is evenly distributed on the surface of the sphere
Four Q charges are arranged in the corner of a square as shown on the diagram. What is the magnitude of the net force on the test charge q placed at the center of the square?
Four Q charges are arranged in the corner of a square as shown on the diagram. What is the direction of the net force on the test charge q placed at the center of the square?
Four positive Q charges are arranged in the corner of a square as shown on the diagram. What is the direction of the net force on the test charge q placed at the center of the square?
the net force is zero
A positively charged sphere is brought near one end of an uncharged metal bar. The end A and B of the metal bar will be charged:
positive, negative
negative, positive
positive, positive
negative, negative
Sphere A carries a net positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?
sphere B remains neutral
sphere B is now positively charged
sphere B is now negatively charged
sphere B is now positive and sphere A is negative
An originally neutral electroscope is briefly touched with a negatively charged plastic rod. Which statement is correct?
electroscope remains neutral
electroscope becomes negatively charged
electroscope becomes positively charged.
electroscope becomes negatively charged and rod becomes positively charged
Two charged objects with an equal charge of Q separated by a distance r attract each other with a certain force. If the charges on both objects are doubled and the separation is halved, the force between them is:
4 times greater
2 times greater
4 times less
16 times greater
Two identical conducting spheres are charged to +Q and -3Q and separated by a distance r. The attractive force between the spheres is F. The two spheres are brought in a brief contact and then moved to the original positions. If the new electrostatic force between the spheres is F’, which of the following is true?
F’ = F
F’ = 3F
F’ = 1/3 F
F’ = 9F
