Course Name: Physics 2 Student: Aryash Chauhan Course ID: SCIH036058 ID: F68560331 Submittal: 52 Progress Test 2 This Progress Test covers the course materials that were assigned in Units 3 and 4. Although the progress test is similar in style to the unit evaluations, the progress test is a closed-book, proctored test. You may not have access to notes or any of the course materials while you are taking the test. It is important that you do your own work. Select the response that best completes the statement or answers the question. You may use your calculator or scratch paper to work out solutions. ____ 1. What is the equivalent resistance of the parallel portion of this circuit diagram? a. b. c. ____ 2. When connected in series, an electric circuit provides branched paths for the flow of electrons. a. b. ____ 3. induction. friction. contact. A short circuit occurs when a. b. c. ____ 5. True False This is an example of charging by a. b. c. ____ 4. 40 W 80 W 20 W the positive wire is connected directly to the negative wire. very short wires are used in a circuit. current lasts in the circuit for only a short time. Compared to gravity, the electromagnetic force is a. b. c. about the same strength. much stronger. much weaker. ____ 6. When an object is charged by contact, electrons flow from the ground onto the object, or from the object onto the ground. a. b. ____ 7. Birds can safely perch on high-voltage wire because a. b. c. ____ 8. every part of the bird’s body is at the same high potential. the wires are insulated. birds are not affected by high voltage. The angle of incidence is a. b. c. ____ 9. True False the angle between the normal and the incident light ray. greater than the angle of reflection. the angle between the surface and the incident light ray. Electrons move in an electric circuit a. b. c. by being physically bumped by other electrons. by interacting with an established electric field. because the wires are so thin. ____ 10. A closed circuit is a circuit in which charge is prevented from flowing. a. b. True False ____ 11. Which of the following statements is true? a. b. c. If a laser beam enters a container of water at the left and exits at the right, the path would be the same as if the light entered from the right and exited at the left. Light paths are reversible for reflection but not refraction. A full glass mug appears to hold more colored liquid than it actually does because of reflection. ____ 12. While standing at the edge of a canyon you shout across and hear your echo 3.00 seconds later. Given that the speed of sound in air is 343 m/s, how wide is the canyon? (d = vt) a. b. c. 1029 m 51.5 m 514.5 m ____ 13. A lightning rod placed above a building repels electrons in the air to prevent leaking of charge onto the ground. a. b. True False ____ 14. What kind of image is formed by a converging lens used as a simple magnifying glass? a. b. c. real, magnified, right side up virtual, magnified, right side up virtual, magnified, upside down ____ 15. A small, positively charged object near a positively charged sphere is moved closer to the sphere. The electrical potential energy of the small object a. b. c. stays the same. decreases. increases. ____ 16. Light waves do not interfere. a. b. True. False. ____ 17. Which of the following statements is true about electric shielding? a. b. c. The absence of an electric field comes about because free electrons within the conductor stop moving when the electric field is zero. The charges arrange themselves to ensure a positive field within the material. If the conductor is spherical, then the charge distribution will not be uniform. ____ 18. Diffuse reflection occurs when the size of surface irregularities is a. b. c. large compared to the wavelength of the light used. small compared to the wavelength of the light used. large regardless of the wavelength of the light used. ____ 19. When plugged into a 120 V wall outlet, how much current is used by a 60 W light bulb? (I=P/V) a. b. c. 7200 A 2A 0.5 A ____ 20. Ions are created when atoms gain or lose a. b. c. electrons. protons. neutrons. ____ 21. Two charges separated a distance of 1.0 meter exert a 2.0-N force on each other. If the charges are pushed to a separation of meter, the force on each charge will be a. b. c. 0.67 N. 6.0 N. 18.0 N. ____ 22. When one light bulb in a parallel circuit containing several light bulbs burns out, the other light bulbs a. b. c. do not burn at all. burn brighter. burn the same as before. ____ 23. While you are standing on the ground in your running shoes, the greatest resistance between you and the ground is in a. b. c. your muscles. your skin. your running shoes. ____ 24. Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be a. b. c. 5 N. 10 N. 40 N. ____ 25. The energy stored in a capacitor comes from the work required to discharge it. a. b. True False ____ 26. What is the resistance of a toaster that uses 5 A of current when connected to a 120 volt power source? (Apply Ohm’s Law.) a. b. c. 5 ohms 24 ohms 600 ohms ____ 27. The eyes of nearsighted people focus light a. b. c. behind the retina. in front of the retina. directly at the retina. ____ 28. FM radio waves are not received as well as AM radio waves in mountain canyons because a. b. c. they have a higher wavelength. they have a shorter wavelength. they do not have a high enough amplitude. ____ 29. An electron is pushed into an electric field where it acquires a 7.0-V electric potential. If two electrons are pushed the same distance into the same electric field, the electric potential of the two electrons is a. b. c. 3.5 V. 7.0 V. 14.0 V. ____ 30. If you stand 2 m in front of a plane mirror your image appears a. b. c. more than 2 m behind the mirror. less than 2 m behind the mirror. 2 m behind the mirror. ____ 31. Laser light is emitted when excited atoms are stimulated to emit photons a. b. c. in phase out of phase of different colors. ____ 32. The way a hologram works is most similar to a a. b. c. diffraction grating. prism. compound lens. ____ 33. Which ray travels parallel to the principal axis and is then refracted by the lens through the focal point? a. b. c. ray 1 ray 2 ray 3 ____ 34. A woman’s hair stands out when she is in contact with a charged Van de Graaff generator. The reason her hair stands out is because a. b. c. hair strands are at high voltage. like charges repel. hair is a good conductor. ____ 35. The objective lens in a compound microscope forms a a. b. real image. virtual image. ____ 36. As you get farther and farther from a point source of waves, the wave fronts appear a. b. c. the same as when they were first created. straighter than when they were first created. rounder than when they were first created. ____ 37. Alternating current is made by a. b. c. alternating current and voltage. alternating the direction of voltage of the power source. huge chemical batters. ____ 38. The effect that we call a mirage has most to do with a. b. c. reflection. refraction. diffraction. ____ 39. The electric field in a certain region of space is 30 N/C. What is the force on a 2 C charge placed in that region? a. b. c. 15 N. 2 N. 60 N. ____ 40. Reflection occurs when one part of a wave travels more slowly than another part. a. b. True False ____ 41. If the wavelengths are large compared to the size of the obstruction a. b. c. there is no diffraction. there is a little diffraction. there is a lot of diffraction. ____ 42. What is the resistance in a circuit if 120 V and 3 A are present? (Apply Ohm’s Law.) a. b. c. 360 ohms 0.025 ohms 40 ohms ____ 43. An image formed by a single diverging lens a. b. c. is upside down. can be projected on a wall. is virtual. ____ 44. Protons and electrons a. b. c. attract each other. repel each other. do not interact. ____ 45. When a wave reaches a boundary between two media and is bounced back into the original medium, it is said to be a. b. c. reflected. refracted. transmitted. ____ 46. What is the focal length of a lens? a. b. c. a line joining the centers of curvature of the lens the distance between the center of the lens and its focal point the location where a beam of light parallel to the principal axis converges ____ 47. Two parallel plates are oppositely charged. The left plate is negative and the right plate is positive. In which direction does the electric field point? a. b. to the left. to the right. ____ 48. You are working for a telescope manufacturing company, and your job is to test precision lenses for flaws. You place a lens on a perfectly flat piece of glass, illuminate it from above with monochromatic light, and then observe irregularly spaced fringes. What could this result tell you about the lens? a. b. c. The lens has been polished too much and is therefore too smooth. The lens has not been polished enough and is therefore irregular. The lens has been polished too much and is therefore too concentric. ____ 49. A diffraction grating consists of a. b. c. many closely spaced parallel slits. a crisscross pattern of narrow slits. a single narrow slit. ____ 50. Which structure regulates the amount of light entering the eye? a. b. c. cornea iris pupil Carefully review your answers on this progress test and make any corrections you feel are necessary. When you are satisfied that you have answered the questions to the best of your ability, transfer your answers to the online test submission page in the presence of your proctor. The University of Nebraska is an equal opportunity educator and employer. ©2019, The Board of Regents of the University of Nebraska. All rights reserved.
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