# Physics Quiz 3

The flashcards below were created by user iishvo on FreezingBlue Flashcards.

1. Which of the following is not a vector: electric line force, electric force, electric field, electric potential?
electric potential
2. One joule per coulomb is a
volt
3. Two identical aluminum objects are insulated form their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential?
B
4. For a proton moving in the direction of the electric field
its potential energy decreases and its electric potential decreases.
5. For an electron moving in a direction opposite to the electric field
its potential energy decreases and its electric potential increases.
6. Several electrons are placed on a hollow conducting sphere. They
become uniformly distributed on the sphere's outer surface.
7. A small charged ball is accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be?
2v
8. A surface on which all points are at the same potential is referred to as
an equipotential surface.
9. A negative charge is moved from point A to point B along an equipotential surface.
No work is required to move the negative charge from point A to point B.
10. An equipotential surface must be
perpendicular to the electric field at any point.
11. The energy acquired by a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred to as
an electron-volt.
12. The electron-volt is a unit of
energy
13. One electron-volt corresponds to
1.6x10^-19 J
14. The absolute potential at a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point charge?
50 V
15. The absolute potential at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point charge?
-50 V
16. The absolute potential at the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also filled with a charge of +Q?
12 V
17. The absolute potential at the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when a second charge of -Q is placed at one of the remaining corner?
zero
18. Electric dipoles always consist of two charges that are
equal in magnitude; opposite in sign
19. One coulomb per volt is