1988 Physics B - Multiple-Choice

A wire in the plane of the page carries a current

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47. A wire in the plane of the page carries a current directed toward the top of the page as shown above. If the wire is located in a uniform magnetic field B directed out of the page, the force on the wire resulting from the magnetic field is (A) directed into the page (B) directed out of the page (C) directed to the right (D) directed to the left (E) zero
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1988 AP Physics Multiple choice test Copyright © 1988 by College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, SAT, and the acorn logo are registered trademarks of the College Entrance Examination Board. 48. Which of the following is always a characteristic an adiabatic process? (A) The temperature does not change ( ' T = 0). (B) The pressure does not change ( ' P = 0). (C) The internal energy does not change ( ' U = 0). (D) No heat flows into or out of the system (Q = 0) (E) No work is done on or by the system (W = 0) An ideal gas undergoes a cyclic process as shown on the graph above of pressure rho versus volume V. 49. During which process is no work done on or by the gas? (A) AB (B) BC (C) CD (D) DE (E) EA 50. At which point is the gas at its highest temperature? (A) A (B) B (C) C (D) D (E) E A ball swings freely back and forth in an arc from point I to point IV, as shown above. Point II is the lowest point in the path, III is located 0.5 meter above II, and IV is I meter above II. Air resistance is negligible. 51. If the potential energy is zero at point II, where will the kinetic and potential energies of the ball be equal? (A) At point II (B) At some point between II and III (C) At point III (D) At some point between III and IV (E) At point IV 52. The speed of the ball at point II is most nearly (A) 3.0 m/s (B) 4.5 m/s (C) 9.8 m/s (D) 14 m/s (E) 20 m/s 1988 AP Physics Multiple choice test Copyright © 1988 by College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, SAT, and the acorn logo are registered trademarks of the College Entrance Examination Board. 53. A magnetic field B that is decreasing with time is directed out of the page and passes through a loop of wire in the plane of the page, as shown above. Which of the following is true of the induced current in the wire loop? (A) It is counterclockwise in direction. (B) It is clockwise in direction. (C) It is directed into the page. (D) It is directed out of the page. (E) It is zero in magnitude. 54. Two isolated charges, + q and - 2q, are 2 centimeters apart. If F is the magnitude of the force acting on charge -2Q, what are the magnitude and direction of the force acting on charge + q ? Magnitude Direction (A) (1/2) F Toward charge - 2q (B) 2 F Away from charge -2q (C) F Toward charge - 2q (D) F Away from charge - 2q (E) 2F Toward charge - 2q 55. Light leaves a source at X and travels to Y along the path shown above. Which of the following statements is correct? (A) The index of refraction is the same for the two media. (B) Light travels faster in medium 2 than in medium 1. (C) Snell's law breaks down at the interface. (D) Light would arrive at Y in less time by taking a straight line path from X to Y than it does taking the path shown above. (E) Light leaving a source at Y and traveling to X would follow the same path shown above, but in reverse.
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