Some electric field lines are shown. Three charges are labeled (1, 2, and 3). 2 2. Which charge(s) is/are positive charges? a. Charge 1 only b. Charge 2 only c. Charges 1 and 3 d. Charges 2 and 3 e. Charges 1, 2, and 3 3. Which charge(s) is/are largest in magnitude? a. Charge 1 only 3 b. Charge 2 only c. Charge 3 only d. Charges 1 and 3 e. Charges 1, 2, and 3 are all equal Some equipotential lines are shown. Two OV points are labeled (A and B). 4. How much work would be done by 1 V -1 V the electric field to move a +2 C 2 V -2 V charge from point B to point A? 3 V a. 0 b. +2] C. -21 d. +41 e . -4JTwo opposite charges of 1 C each are separated by a distance 2 meters as shown. Consider the points A, B, and Cat the locations shown. 1 m 1 m 1 m 1 m B e 1C 1c 5. At which point is the electric field magnitude highest? a. Point A b. Point B c. Point C d. Points A and C e. All three are the same 6. At which point is the electric potential closest to zero? Point A b. Point B Point C d. Points A and C e. All three are the same 7. In which direction is the electric field at point A? a. It is zero. b. +x (right) C. -x (left) d. ty (up) e. -y (down) 8. In which direction is the electric field at point B? a. It is zero. b. +x (right) C. -x (left) d. +y (up) e. -y (down) 9. What is the sign of the electric potential at point A? a. It is zero b. Positive c. Negative 10. If an electron were released from rest at point B, which way would it start to move due to its interaction with the charges? a. It wouldn't move. b. +x (right) C. -x (left) d. ty (up) e. -y (down)Two opposite currents of 1 Aeach are separated by a distance 2 meters as shown. The current on the left is coming out of the page [+2] toward you] and the current on the right is going into the page {2} away from you as shown. Consider the points A, El, and Cat the locations shown. 1 rn 1 m 1- rn 1 m 1A 1A 11. At which point is the magnetic eld magnitude highest? a Point A b. Point B c. Point C d Points A and C e Allthree arethe same 12. In which direction is the magnetic field at pointA? a. It is zero. b. +x [right] c. -x Heft] d. +vtupl e - [down] 15. In which direction is the magnetic field at point B? a. It is zero. b. +x[right] c. x Heft] d. +v tupl e. I,r [down] 14. what is the direction of the magnetic force on the right wire caused by the left one? a. It is zero. b. +x [right] c. x Heft] d. +v tupl e. -I,r [down] 15. If an electron were released from rest at point B, which way would it start to move due to its interaction with the currents? a. It wouldn't move. b. +x [right] c. x Heft] d. +v tupl e. I,r [down] A circuit is shown. The source puts out 1 V, and the resistors are each 1 D. D 16. Resistors A and B are a. In Series b. In Parallel c. Neither in Series nor in Parallel 1?. Resistors B and C are a. In Series b. In Parallel c. Neither in Series nor in Parallel 13. Resistors C and E are a. In Series b. In Parallel c. Neither in Series nor in Parallel 19. If resistors D and E are combined into an equivalent resistor, its resistance would be a. CLBQ b. in c. 1.5(1 Cl. 2C: e. These resistors cannot be combined into an equivalent resistor 20. which of the following currents is lowest in magnitude? a. Current through resistor A b. Current through resistor B c. Current through resistor D cl. Currents through resistors B and C (tied for lowest] e. All of these currents are equal 21. The total equivalent resistance seen by the source is a. 0.235 D b. 1.25 D c. 1.40 0 Cl. 2.3-3 [1 e. 2.5? D A circular loop of current is sitting in the xy plane. It is in a magnetic field that points into the page (-z direction) and has the same magnitude (1 T) everywhere. What current would be induced in the current loop by the following? 22. The magnetic field strength is increased to 2 T into the page. a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced current B 23. The magnetic field strength is decreased to 0.5 T into the page. a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced current 24. The magnetic field strength is changed to 1 T out of the page. a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced current 25. The magnetic field vector is tilted towards the +x direction (but its magnitude remains the same). a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced current 26. The loop of wire is crushed so that its size decreases. a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced current 27. The loop of wire is moved back and forth along the x direction (without rotating it). a. Induced current is clockwise b. Induced current is counterclockwise c. There is no induced currentSome unpolarized light of intensity 10 W/m' hits a series of three polarizers whose polarization axes are in the directions shown (18%, 36', and 54" as measured from the x axis). Unpolarized Light 10 W/m 28. In which direction does the electric field point in the unpolarized light, before it enters the first polarizer? a. The light has no electric field vector b. The electric field vector has no direction, only a magnitude C. The electric field vector points in a mixture of random directions d. The electric field vector points in a specific direction, but we don't know what that direction is e. The electric field vector points in the x direction 29. What is the intensity , that the light has after passing through the first polarizer? a. 0.95 W/m^2 b. 3.1 W/m^2 C. 5.0 W/m^2 d. 9.0 W/m^2 e. 9.5 W/m^2 30. The relationship between intensities , and , can be calculated via a. I, = 0.10/1 b. I, = 0.351, c. I, = 0.50/1 d. I, = 0.651, e. Iz = 0.901 31. The third polarizer is currently at 54'. What direction could it be rotated to so that the final intensity /, would be zero? a. 0' b 36 C. 90 d. 108' e . 126"When a light ray encounters a certain optical element (represented by a generic rectangle), the element has the following effect on the ray. What is the optical element? Circles show the focal length on each side. 32. 35. Converging (Convex) Lens a- Converging (Convex) Lens b. Converging (Concave) Mirror b. Converging (Concave) Mirror c. Diverging (Concave) Lens c. Diverging (Concave) Lens d. Diverging (Convex) Mirror d. Diverging (Convex) Mirror e. Cannot be Determined e. Cannot be Determined 33. 36. a. Converging (Convex) Lens a. Converging (Convex) Lens b. Converging (Concave) Mirror b. Converging (Concave) Mirror c. Diverging (Concave) Lens C. Diverging (Concave) Lens d. Diverging (Convex) Mirror d. Diverging (Convex) Mirror e. Cannot be Determined e. Cannot be Determined 34. Converging (Convex) Lens 37. b. Converging (Concave) Mirror Converging (Convex) Lens c. Diverging (Concave) Lens b. Converging (Concave) Mirror d. Diverging (Convex) Mirror .. Diverging (Concave) Lens e. Cannot be Determined d. Diverging (Convex) Mirror a. Cannot be Determined 38. A certain mirror produces a real, inverted, minified image. In this scenario, the image distance must be a. Positive b. Negative Larger than the object distance d. Smaller than the object height e. Smaller than the focal lengthThe following image shows an interference pattern from a double slit experiment. A E B 39. For which location(s) shown is the path length difference 27? a. All five of the points b. Point B C. Point C d. Point D e. Point E 40. For which of the locations shown is the interference destructive? a. Point A only b. Point E only . Points A, C, and E d. Points B and D e. Points A, B, C, D, and E 41. If point C occurs at an angle of 0.1' from the center spot and the laser used had a wavelength of 400 nm, what was the slit spacing? 1. 0.11 mm b. 0.23 mm c. 0.34 mm d. 0.46 mm e. 0.69 mm 42. A light ray strikes an interface between two materials at 67" from the interface (or 23 from the normal) as shown. The index of refraction of the two materials is 1.25 and 1.65 respectively as shown. At what angle will the transmitted ray emerge? 67" Index = 1.25 Index = 1.65 a. 73" from the interface (17' from the normal) b. 67' from the interface (23* from the normal) 59" from the interface (31* from the normal) d. 44' from the interface (46' from the normal) e. There will be no transmitted ray due to total internal reflection43. Fill in the missing piece of this nuclear 48. The assumption that even very low reaction: Ac+7 - 48 levels of dangerous radiation can potentially cause cancer is a key part of b H the C. a. Linear No-Threshold Model d. b. Threshold Model e. 16 Hermetic Model 44. Fill in the missing piece of this nuclear d. Relativistic Model reaction: 18At + $Li -7 a. Electromagnetic Model a. 203Ra 49. For an average person, the main way b. Ra that they are dosed with dangerous C. 217pb forms of radiation is d. a. Cell Phones e. b. Nuclear Fallout 45. He is also known as c. Medical Scans Alpha radiation d. Air Travel b. Beta radiation e . Radon Gas c. Gamma radiation 50. Given that the mass of a jH nucleus is d. Delta radiation 3.3435 x 10 2kg, what is the binding e. X-Ray radiation energy of the nucleus? 46. A certain nucleus contains 4 protons a. 3.6 x 10-13/ and 5 neutrons. Which of the following b. 1.5 x 10 10 symbols correctly represents this C. 3.0 x 10 10] nucleus? d. 4.5 x 10-10 BE 2. 6.0 x 10 10] b. iBE C. Be d ABE Be 47. If you want to know whether some radiation is potentially cancer-causing, you should ask whether it is Polarized b. Magnetized C. lonizing d. Isotopic e . Linear