(1) (2) (1) doubling charge q 1, only
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1 Coulomb s Law Class: Name: Date: 1. As the distance between two point charges is tripled, the electrostatic force between the charges (1) decreases to one-ninth the original force decreases to one-third the original force 4. If the charge on each of two small spheres a fixed distance apart is doubled, the force of attraction between the spheres will be (1) quartered doubled (3) halved (4) quadrupled (3) increases by a factor of three (4) increases by a factor of nine 2. What is the magnitude of the electrostatic force and between a charge of coulomb and a charge of coulomb separated by 0.30 meter? (1) N N 5. Two charges that are 2 meters apart repel each other with a force of newton. If the distance between the charges is decreased to 1 meter, the force of repulsion will be (1) N N (3) N (4) N (3) N (4) N 3. Electrostatic force exists between two point charges with a separation distance d. Which graph best represents the relationship between and d? 6. The diagram represents two charges q 1 and q 2, separated by distance d. Which change would produce the greatest increase in the electrical force between the two charges? (1) (1) doubling charge q 1, only (3) (4) doubling d, only (3) doubling d and charge q 1, only (4) doubling d and charges q 1 and q 2 page 1
2 7. The electrostatic force between two positive point charges is when the charges are 0.1 meter apart. When these point charges are placed 0.05 meter apart, the electrostatic force between them is (1) 4, and attracting, and attracting 4 (3) 4, and repelling (4), and repelling 4 9. The diagram shows the arrangement of three charged hollow metal spheres, A, B, and C. The arrows indicate the direction of the electric forces acting between the spheres. At least two of the spheres are positively charged. Which sphere, if any, could be negatively charged? (1) sphere A sphere B (3) sphere C (4) no sphere 8. An electron is located 1.0 meter from a +2.0-coulomb charge, as shown in the diagram. The electrostatic force acting on the electron is directed toward point 10. A repulsive electrostatic force of magnitude exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres? (1) doubling q on one sphere while doubling q on both spheres while (1) A B (3) C (4) D (3) doubling q on one sphere while (4) doubling q on both spheres while Class: page 2 Coulomb s Law
3 11. Two plastic rods, A and B, each possess a net negative charge of coulomb. The rods and a positively charged sphere are positioned as shown 13. Electrostatic force exists between two point charges. If the distance between the charges is tripled, the force between the charges will be Which vector best represents the resultant electrostatic force on the sphere? (1) 9 3 (3) 3 (4) 9 (1) (3) (4) 14. Which net charge could be found on an object? (1) C C (3) C (4) C 12. The diagram given shows two metal spheres suspended by strings and separated by a distance of 3.0 meters. The charge on sphere A is coulomb and the charge on sphere B is coulomb. Which statement best describes the electrical force between the spheres? 15. The accompanying diagram shows two metal spheres charged to coulomb and coulomb, respectively, on insulating stands separated by a distance of 0.10 meter. (1) It has a magnitude of 15 N and is repulsive. It has a magnitude of 45 N and is repulsive. (3) It has a magnitude of 15 N and is attractive. (4) It has a magnitude of 45 N and is attractive. The spheres are touched together and then returned to their original positions. As a result, the magnitude of the electrostatic force between the spheres changes from 2.7 N to (1) 1.4 N 1.8 N (3) 3.6 N (4) 14 N Class: page 3 Coulomb s Law
4 16. An electrostatic force of magnitude exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres? 19. Which graph best represents the electrostatic force between an alpha particle with a charge of +2 elementary charges and a positively charged nucleus as a function of their distance of separation? (1) doubling q on one sphere while (1) doubling q on both spheres while (3) doubling q on one sphere while (4) doubling q on both spheres while 17. What is the net static electric charge on a metal sphere having an excess of +3 elementary charges? (3) (1) C C (3) C (4) C (4) 18. What is the approximate electrostatic force between two protons separated by a distance of meter? (1) N and repulsive N and attractive (3) N and repulsive (4) N and attractive Class: page 4 Coulomb s Law
5 20. The diagram below shows two small metal spheres, A and B. Each sphere possesses a net charge of coulomb. The spheres are separated by a distance of 1.0 meter. Which combination of charged spheres and separation distance produces an electrostatic force of the same magnitude as the electrostatic force between spheres A and B? (1) (3) (4) Class: page 5 Coulomb s Law
6 Problem-Attic format version c EducAide Software Licensed for use by B ejzo Terms of Use at Class: Coulomb s Law 06/27/ Answer: Answer: Answer: Answer: Answer: Answer:
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