# Physics Quiz 2 Questions

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1. A point charge of +Q is placed at the center of a square. When a second point charge of -Q is placed at one of the square's corner, it is observed that an electrostatic force of 2.0 N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of the square?
zero
2. A point charge of +Q is placed at the centroid of an equilateral triangle. When a second charge of +Q is placed at one oft he triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude of the force that acts on the center charge due to the third charge of +Q placed at one of the other vertices?
8.0 N
3. At twice the distance from a point charge, the strength of the electric field
is one-fourth its original value.
4. Is it possible to have a zero electric field value between a negative and positive charge along the line joining the two charges?
Yes, if the two charges are equal in magnitude.
5. Is it possible to have a zero electric field between two positive charges along the line joining the two charges?
Yes, regardless of the magnitude of the two charges.
6. Electric field lines near positive point charges
7. The electric field shown l   l lllllll
increases to the right
8. Can electric field lines intersect in free space?
no
9. A solid block of metal in electrostatic equilibrium is placed in uniform electric field. Give a statement concerning the electric field in the block's interior.
The interior field points in a direction that is at right angles to the exterior field.
10. If a solid metal sphere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surface is
zero for both.
11. A cubic block of aluminum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surface?
the top surface is charged positively.
12. If a conductor is in electrostatic equilibrium near an electric charge
the electric field on the surface of the conductor is perpendicular to the surface.
13. An electron is held up against the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the proton?
5.1 m
14. Two point charges each ave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two charges?
zero
 Author: iishvo ID: 228102 Card Set: Physics Quiz 2 Questions Updated: 2013-07-25 03:17:51 Tags: Quiz Folders: Description: Physics Show Answers: