Test Review FQ3eso_U5_4_Electric field_test_review

Transcription

1 Test Review FQ3eso_U5_4_Electric field_test_review Identify the letter of the choice that best completes the statement or answers the question. 1.- In which diagram do the field lines best represent the gravitational field around Earth? 2.- Which diagram best represents the gravitational field lines surrounding the Moon? 3.- In the diagram below, P is a point near a negatively charged sphere. Which vector best represents the direction of the electric field at point P? 4.- Which diagram represents the electric field between two oppositely charged conducting spheres?

2 5.- Which diagram represents the electric field lines between two small electrically charged spheres? 6.- The diagram below represents the electric field in the region of two small charged spheres, A and B. What is the sign of the net charge on A and B? a) A is positive and B is positive. b) A is negative and B is negative. c) A is positive and B is negative. d) A is negative and B is positive 7.- The diagram below represents the electric field surrounding two charged spheres, A and B. What is the sign of the charge of each sphere? a) Sphere A is positive and sphere B is negative. b) Sphere A is negative and sphere B is positive. c) Both spheres are positive. d) Both spheres are negative.

3 8.- A positive test charge is placed between an electron, e, and a proton, p, as shown in the diagram below. When the test charge is released, it will move toward a) A c) C b) B d) D 9.- Two small metallic spheres, A and B, are separated by a distance of m, as shown. The charge on each sphere is Coulomb. Point P is located near the spheres. Which arrow best represents the direction of the resultant electric field at point P due to the charges on spheres A and B? 10.- Which diagram correctly represents an electric field?

4 11.- The diagram below represents a positively charged particle about to enter the electric field between two oppositely charged parallel plates The electric field will deflect the particle a) into the page c) toward the top of the page c) out of the page d) toward the bottom of the page 12.- A beam of electrons is directed into the electric field between two oppositely charged parallel plates, as shown in the diagram below. The electrostatic force exerted on the electrons by the electric field is directed a) into the page c) toward the bottom of the page b) out of the page d) toward the top of the page 13.- An electron placed between oppositely charged parallel plates A and B moves toward plate A, as represented in the diagram below. What is the direction of the electric field between the plates? a) toward plate A c) into the page b) toward plate B d) out of the page 14.- The diagram below shows a beam of electrons fired through the region between two oppositely charged parallel plates in a cathode ray tube.

5 After passing between the charged plates, the electrons will most likely travel path a) A c) C b) B d) D 15.- In the diagram below, proton p, neutron n, and electron e are located as shown between two oppositely charged plates. The magnitude of acceleration will be greatest for the a) neutron, because it has the greatest mass b) neutron, because it is neutral c) electron, because it has the smallest mass d) proton, because it is farthest from the negative plate 16.- Which graph best represents the relationship between the strength of an electric field and distance from a point charge? 17.- Two points, A and B, are located within the electric field produced by a 3.0 nanocoulomb charge. Point A is 0.10 meter to the left of the charge and point B is 0.20 meter to the right of the charge, as shown in the diagram below. Compared to the magnitude of the electric force at point A, the magnitude of the electric force at point B for the same amount of charge is a) half as great c) one-fourth as great c) twice as great d) four times as great

6 Test Review FQ3eso_U5_4_Electric field_test_review Answers

7 Test Review FQ3eso_U5_4_Electric field_test_review Key part 1. a. 11. d. 2. d. 12. d. 3. a. 13. b. 4. c. 14. a. 5. b. 15. c. 6. b. 16. c. 7. b. 17. c. 8. d. 9. c. 10. a.