PH 2004 Spring Quizzes - Physics Honors Physics Honors...

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Unformatted text preview: Physics Honors Physics Honors Distributed By: Tyrone G Carter Quiz: Chapters 23 and 24 1. Lenses that are thicker at the center than at the edges A. cause light rays to diverge. B. bend light rays to a focal point.* C. have no effect on light rays. D. reflect light rays back. E. Not covered in the assigned reading. 2. Light traveling at an angle into a denser medium is refracted A. toward the normal.* B. away from the normal. C. parallel to the normal. D. equally. E. Not covered in the assigned reading. 3. The colors on an oil slick or a soap film are caused by reflection and A. diffraction. B. interference.* C. refraction. D. polarization. E. Not covered in the assigned reading. 4. Diverging spherical mirrors produce images which A. are smaller than the actual object.* B. are larger than the actual object. C. are the same size as the actual object. D. A, B, and C can all be true. E. Not covered in the assigned reading. 5. A light ray, traveling parallel to a converging mirror's axis, strikes the mirror's surface near its midpoint. After reflection, this ray travels A. parallel to the mirror's axis. B. at right angles to the mirror's axis. C. through the mirror's center of curvature. D. through the mirror's focal point.* E. Not covered in the assigned reading. 6. A coverging lens has focal length f. An object is placed a distance of 1.5f from the lens. The image formed is __________ and ___________ the object. A. virtual; larger than B. virtual; the same size as C. virtual; smaller than D. real; larger than* E. real; smaller than 7. Monochromatic light from a distant source is incident on two parallel narrow slits. After passing through the slits the light strikes a screen. What will be the nature of the pattern of light observed on the screen? A. The screen will be most brightly lit at its center, with the intensity decreasing slowly and uniformly on either side. B. A series of alternating light and dark bands.* C. A rainbow of colored lines will be seen spreading out on either side of the center. D. Two bright bands of light, one in line with each slit. E. The screen will be uniformly illuminated except for two dark bands, one in line with each slit. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 8. The critical angle for a beam of light passing from water into air is 48.8°. This means that all light rays with an angle of incidence greater than 48.8° will be A. absorbed. B. totally reflected.* C. partially reflected and transmitted. D. totally transmitted. E. Not covered in the assigned reading. 9. What principle is responsible for light spreading as it passes through a narrow slit? A. refraction B. polarization C. diffraction* D. interference E. Not covered in the assigned reading. 10. Which color of light undergoes the greatest refraction when passing from air to glass? A. Red B. Yellow C. Green D. Blue* E. Not covered in the assigned reading. 1. Sphere A carries a net positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct? A. Sphere B remains neutral. B. Sphere B is now positively charged. C. Sphere B is now negatively charged.* D. Protons enter Sphere B through the wire. E. Protons leave Sphere B through the wire. 2. Electric field lines A. intersect at the midpoint between two equal like charges. B. intersect at the midpoint between a positive and a negative charge. C. intersect at the centroid of an equilateral triangle with like charges at each corner. D. intersect halfway between two oppositely charged infinite plates. E. never intersect.* 3. Metallic Sphere A carries a net charge and metallic sphere B is neutral. They are placed near each other on an insulated table. The force between the spheres A. is zero since one sphere is neutral. B. tries to push the spheres apart. C. tries to push the spheres together.* D. is attractive only if Sphere A has a positive charge. E. is repulsive only if Sphere A has a negative charge. 4. A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive charge and the silk A. acquires a positive charge also. B. acquires a negative charge.* C. remains neutral. D. acquires neutrons. Distributed By: Tyrone G Carter TGC Physics Honors E. Distributed By: Tyrone G Carter Not covered in the assigned reading. 5. At twice the distance from a point charge, the strength of the electric field A. is four times its original value. B. is twice its original value. C. remains constant. D. is one-half its original value. E. is one-fourth its original value.* 6. Electric field lines A. circle clockwise around positive charges. B. circle counter-clockwise around positive charges. C. radiate outward from all charges. D. radiate outward from positive charges.* E. radiate outward from negative charges. 7. Which of the following correctly describes an electric field drawing? A. A map that shows how much energy a charge would have if it were at a certain point. B. A map that shows how much force would act on a charge if it were at a certain point.* C. A map that shows how much momentum would act on a charge if it were at a certain point. D. None of the above are correct. E. Not covered in the assigned reading. 8. A hollow metallic sphere is placed in a region permeated by a uniform electric field that is directed upward. Which statement is correct concerning the electric field in the sphere's interior? A. The field is zero everywhere in the interior.* B. The field is directed upward. C. The field is directed downward. D. The field is zero only at the sphere's center. E. The field is zero only at the sphere's surface. 9. An originally neutral electroscope is briefly touched with a positively charged glass rod. The electroscope A. remains neutral. B. is negatively charged by conduction. C. is negatively charged by induction. D. is positively charged by conduction.* E. is positively charged by induction. 10. A cubic block of aluminum rests on a wooden table in a region where a uniform electric field is directed straight upward. The charge of the top surface of the aluminum cube is A. positive.* B. negative. C. neutral. D. the same as that of the bottom surface. E. the same as that of all the other surfaces. Physics Honors 1. Chapter 17 quiz Consider a uniform electric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1 m directly east of the point? A. 15 V Distributed By: Tyrone G Carter TGC Physics Honors B. C. D. E. Distributed By: Tyrone G Carter 30 V * 130 V None of these. Not covered in the assigned reading. 2. Two identical aluminum objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential? A. Object A B. Object B * C. Both are at the same potential. D. Cannot be determined. E. Not covered in the assigned reading. 3. A dielectric material such as paper is placed between the plates of a capacitor. What happens to the capacitance? A. No change. B. Becomes larger. * C. Becomes smaller. D. Becomes infinite. 4. The absolute potential at a distance of 2 m from a negative point charge is -100 V. What is the absolute potential 4 m away from the same point charge? A. -25 V B. -50 V * C. -200 V D. -400 V E. Not covered in the assigned reading. 5. If the electric field between the plates of a given, fully charged capacitor is weakened, the capacitance of that capacitor A. increases. * B. decreases. C. does not change. D. None of these. E. Not covered in the assigned reading. 6. A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. When this system reaches its steady state, the voltage across the resistor is _________ the battery's terminal voltage. A. greater than B. less than * C. equal to D. Not covered in the assigned reading. * 7. The absolute potential at the exact center of a square is 3 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also filled with a charge of +Q? A. 0V B. 3V C. 9V D. 12 V * E. Not covered in the assigned reading. 8. A small charged ball is accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be? A. v B. 2v * Distributed By: Tyrone G Carter TGC Physics Honors C. D. E. Distributed By: Tyrone G Carter 4v 16v Not covered in the assigned reading. 9. A parallel-plate capacitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this capacitor has A. increased. * B. decreased. C. not changed. D. become zero. E. Not covered in the assigned reading. 10. Consider a uniform electric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1 m directly south of that point? A. zero B. 30 V C. 50 V D. 80 V * E. Not covered in the assigned reading. Physics Honors Chapter 18-19 Quiz 1. Three identical resistors are connected in parallel to a 12-V battery. What is the voltage of any one of the resistors? A. 36 V B. 12 V * C. 4V D. None of these E. Not covered in the assigned reading. 2. When resistors are connected in series, A. the same power is dissipated in each. B. the potential difference across each is the same. C. the current flowing in each is the same. * D. more than one of these are true. E. Not covered in the assigned reading. 3. Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry? A. 3Q B. Q* C. Q/3 D. None of these. E. Not covered in the assigned reading. 4. If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will A. increase by a factor of two. B. increase by a factor of four. C. decrease by a factor of two. * Distributed By: Tyrone G Carter TGC Physics Honors D. Distributed By: Tyrone G Carter decrease by a factor of four. 5. Right when you turn on a light bulb, the metal inside of it is cool. As time goes on, the metal gets heated up by the current. Which of the following happens as time goes on? A. Resistance increases. * B. Resistance decreases. C. Current increases. D. Voltage increases. E. Power increases. 6. A 14 A current flows into a parallel combination of a 3- and a 4- resistor. What current flows through the 3- resistor? A. 8A* B. 7A C. 6A D. None of these. 7. A battery is connected to a wire. What could be done to increase the wire's resistance? A. Make the wire thinner. * B. Make the wire shorter. C. Make the wire out of a metal with lower resistivity. D. Cool down the wire. E. Not covered in the assigned reading. 8. A battery is connected to a circuit containing a capacitor and a resistor connected in series. After a long time, the battery is disconnected, and the capacitor is connected to a light bulb and a switch in series. The switch is closed, and as time goes on the brightness of the bulb A. remains at a constant level. B. increases linearly to a maximum value. C. increases exponentially to a maximum value. D. decreases linearly to zero. E. decreases exponentially to zero. * 9. Current in the United States alternates direction 60 times per second and has an rms voltage of 120 V. What is the maximum voltage of the current? A. 120 V B. 170 V * C. 60 V D. 100 V 10. A 1 mF and a 2 mF capacitor are connected in series across a 3 V battery. When the capacitors are fully charged, what is the voltage across the 2 mF capacitor? A. 3V B. 2V C. 1V* D. None of these. Physics Honors 1. Quiz: Chapter 20 A current carrying circular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise direction. Inside the loop, the magnetic field A. circles clockwise around the loop. Distributed By: Tyrone G Carter TGC Physics Honors B. C. D. Distributed By: Tyrone G Carter circles counterclockwise around the loop. points straight up out of the table. * points straight down into the table. 2. Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in the same direction, A. one wire is pushed up and the other is pushed down. B. both wires are pushed up. C. the wires attract each other. * D. the wires repel each other. E. both wires are pushed down. 3. A vertical wire carries a current straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this current? A. Down B. North C. East D. West * 4. A velocity selector consists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. If the particles move toward the east, and the magnetic field is directed to the north, what direction should the electric field point? A. east B. west C. up D. down * E. Not covered in the assigned reading. 5. A charged particle is observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would be _________ the original radius. A. twice * B. four times C. one-half D. one-fourth 6. A horizontal wire carries a current straight toward you. From your point of view, the magnetic field caused by this current A. points directly away from you. B. points to the left. C. circles clockwise around the wire. D. circles counterclockwise around the wire. * E. Not covered in the assigned reading. 7. A charged particle moves and experiences no magnetic force. From this we can conclude that A. no magnetic field exists in that region of space. B. the particle is moving parallel to the magnetic field. C. the particle is moving at right angles to the magnetic field. D. either no magnetic field exists or the particle is moving parallel to a magnetic field. * E. Not covered in the assigned reading. 8. A charged particle moves across a constant magnetic field. The magnetic force on this particle A. changes the particle's speed. B. causes the particle to accelerate. * C. is in the direction of the particle's motion. D. More than one of the preceding answers are correct. Distributed By: Tyrone G Carter TGC Physics Honors E. Distributed By: Tyrone G Carter Not covered in the assigned reading. 9. A particle moves eastward at speed v in a uniform magnetic field that is directed straight down. The magnetic force pushes the particle toward the south. The particle is A. a proton. B. an electron. * C. a neutron. D. uncharged. E. Not covered in the assigned reading. 10. A circular wire loop lies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. The earth's magnetic field points to the north. Which side of the coil tends to lift off of the table because of the torque caused by the current's interaction with the magnetic field? A. The north side. B. The east side. C. The south side. * D. The west side. E. Not covered in the assigned reading. Physics Honors Chapter 21 Reading Test 1. The primary of a transformer has 100 turns and its secondary has 200 turns. If the input voltage to the primary is 100 V, we can expect the output voltage of the secondary to be A. 50 V B. 100 V C. 200 V * D. None of these. E. Not covered in the assigned reading. 2. A transformer is a device that uses mutual induction to create increase or decrease the voltage of a current. Therefore, a transformer can operate using A. changing magnitude DC. * B. AC only. C. constant magnitude DC. D. all types of currents. E. Not covered in the assigned reading. 3. As a coil is removed from a magnetic field, a voltage is induced in the coil causing a current to flow within the coil. This current interacts with the magnetic field producing a force which A. acts at right angles to the coil's motion. B. acts in the direction of the coil's motion. C. causes the coil to tend to flip over. D. opposes the coil's motion. * E. Not covered in the assigned reading. 4. A coil lies flat on a table top in a region where the magnetic field vector points vertically straight up. The magnetic field vanishes suddenly. When viewed from above, what is the direction of the induced current in this coil as the field fades? A. counterclockwise. * B. clockwise. Distributed By: Tyrone G Carter TGC Physics Honors C. D. Distributed By: Tyrone G Carter There is no induced current in this coil. Not covered in the assigned reading. 5. An inductor is connected in series with an ideal battery V, a resistor R, and a switch. When the switch is closed, the current through the resistor A. instantaneously jumps from zero to a value of V/R. B. gradually changes from zero to a value of V/R. * C. instaneously jumps from a value of V/R to zero. D. gradually changes from a value of V/R to zero. E. none of these. 6. The voltage across an ideal inductor is proportional to A. the current flowing through it. B. the resistance of the circuit. C. the rate of change of the current through it. * D. None of these. E. Not covered in the assigned reading. 7. A circular coil lies flat on a horizontal table. A bar magnet is held above its center with its north pole pointing down. The stationary magnet induces (when viewed from above) _______ in the coil. A. no current * B. a clockwise current C. a counterclockwise current D. Not covered in the assigned reading. 8. The primary of a transformer has 100 turns and its secondary has 200 turns. If the power input to the primary is 100 W, we can expect the power output of the secondary to be (neglecting frictional losses) A. 50 W B. 100 W * C. 200 W D. None of these. E. Not covered in the assigned reading. 9. In which of the following circuit devices does the AC frequency help determine the opposition to the flow of current? A. a resistor B. a capacitor C. an inductor D. two of these * E. Not covered in the assigned reading. 10. Two circuits lay on a table, very close to each other but not electrically connected. One circuit consists of a battery, a switch, an inductor, and a lightbulb. The other circuit consists of an inductor and a lightbulb. The switch is closed, and then a long time later the switch is opened. When are BOTH lightbulbs brightly lit? A. Just after the switch is opened. B. Just after the switch is closed. C. The entire time. D. both A and B are true. * E. None of these are true. Physics Honors Distributed By: Tyrone G Carter Quiz: Chapters 13-15 TGC Physics Honors Distributed By: Tyrone G Carter 1. If the pressure acting on an ideal gas at constant temperature is tripled, its volume is A. reduced to one-third. * B. increased by a factor of three. C. increased by a factor of two. D. reduced to one-half. E. none of the other choices is correct. 2. A chunk of really cold ice (T = -20C) is added to a thermally insulated container of cold water (T = 0C) A. The ice melts until the ice and water are at the same temperature. B. The water cools down until it is at the same temperature as the ice. C. Some of the water freezes and the chunk of ice gets larger. * D. None of these happen. 3. Phase changes occur A. as the temperature decreases. B. as the temperature increases. C. as the temperature remains the same. * D. all of these are possible. 4. When water freezes, the entropy of the water A. increases. B. decreases. * C. does not change. D. could either increase or decrease. 5. A heat engine absorbs 64 J of heat each cycle and exhausts 42 J. What is the efficiency each cycle? A. 66% B. 52% C. 40% D. 34% * 6. Both the pressure and volume of a given sample of an ideal gas double. This means that its temperature in Kelvins must A. double. B. quadruple. * C. decrease by a factor of four. D. remain unchanged. E. decrease by a factor of two. 7. A cup of water is placed in a freezer which is located in an insulated room. When the water freezes, the entropy of the room A. increases more than the entropy of the water decreased. * B. decreases just as much as the entropy of the water decreased. C. does not change. D. increases less than the entropy of the water decreased. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 8. An ideal gas is compressed isothermally from 30 L to 20 L. During this process, 6 J of energy is expended by the external mechanism that compressed the gas. What is the change of internal energy for this gas? A. +6 J B. zero * C. -6 J D. None of the above. 9. A gas is quickly compressed in an isolated environment. During the event, the gas exchanged no heat with its surroundings. This process is A. isothermal. B. isochoric. C. isobaric. D. adiabatic. * 10. When the first law of thermodynamics, Q = U + W, is applied to an ideal gas that is taken through an isobaric process, U = 0 A. B. W=0 C. Q=0 D. none of these. * 11. 10 J of heat energy are transferred to a sample of ideal gas at constant volume. As a result, the internal energy of the gas A. increases by 10 J. * B. increases by less than 10 J. C. increases by more than 10 J. D. remains unchanged. E. decreases by 10 J. 12. A sample of an ideal gas is slowly compressed to one-half its original volume with no change in temperature. What happens to the average speed of the molecules in the sample? A. It does not change. * B. It doubles. C. It halves. D. None of these. 13. A heat engine absorbs 64 MJ of heat each cycle and exhausts 42 MJ. How much work is done during each cycle? A. 42 MJ B. 22 MJ * C. -22 MJ D. -42 MJ 14. When the first law of thermodynamics, Q = U + W, is applied to an ideal gas that is taken through an isothermal process, A. U = 0 * B. W=0 C. Q=0 D. none of these. 15. When the first law of thermodynamics, Q = U + W, is applied to an ideal gas that is taken through an adiabatic process, A. U = 0 B. W=0 C. Q=0* Distributed By: Tyrone G Carter TGC Physics Honors D. Distributed By: Tyrone G Carter none of these. 16. If you double the absolute temperature of an object, it will radiate energy A. 16 times faster. * B. 8 times faster. C. 4 times faster. D. none of the above. 17. Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, the average molecular kinetic energy of oxygen, compared to hydrogen A. is greater. B. is less. C. is the same. * D. cannot be determined. 18. Consider two equal volumes of gas at a given temperature and pressure. One gas, oxygen, has a molecular mass of 32. The other gas, nitrogen, has a molecular mass of 28. What is the ratio of the number of oxygen molecules to the number of nitrogen molecules? A. 32 to 28 B. 28 to 32 C. 1 to 1 * D. None of these. 19. How much heat must be removed from steam to change it to liquid? A. 333 kJ/kg B. 2260 kJ/kg * C. 4.18 kJ/kg D. None of these. 20. According to Boyle's Law, PV = constant for a given temperature. As a result, an increase in volume corresponds to a decrease in pressure. This happens because the molecules A. collide with each other more frequently. B. move slower on the average. C. strike the container wall less often. * D. transfer less energy to the walls of the container each time they strike it. 21. An ideal gas is expanded isothermally from 20 L to 30 L. During this process, 6 J of energy is expended by the external mechanism that expanded the gas. Which of the following statements is correct? A. 6 J of energy flow from surroundings into the gas. * B. 6 J of energy flow from the gas into the surroundings. C. No energy flows into or from the gas since this process is isothermal. D. None of these statements is correct. 22. Consider two neighboring rectangular houses built from the same materials. One of the houses has twice the length, width, and height of the other. Under identical climatic conditions, each house is supplied with heat so that they have the same inside temperature. Compared to the small house, the larger house needs heat supplied at A. twice the rate. B. 4 times the rate. * C. 16 times the rate. D. none of these. 23. The second law of thermodynamics leads us to conclude that A. the total energy of the universe is constant. B. disorder in the universe is increasing with the passage of time. * C. it is theoretically possible to convert heat into work with 100% efficiency. Distributed By: Tyrone G Carter TGC Physics Honors D. Distributed By: Tyrone G Carter the average temperature of the universe is increasing with the passage of time. 24. 10 J of heat energy is transferred to a sample of ideal gas at constant pressure. As a result, the internal energy of the gas A. increases by 10 J. B. increases by less than 10 J. * C. increases by more than 10 J. D. remains unchanged. E. Decreases by 10 J. 25. The temperature of an ideal gas increases from 2C to 4C while remaining at constant pressure. What happens to the volume of the gas? A. It decreases slightly. B. It decreases to one-half its original volume. C. It more than doubles. D. It doubles. E. It increases slightly. * 26. A gas is allowed to expand at constant pressure as heat is added to it. This process is A. isothermal. B. isochoric. C. isobaric. * D. adiabatic. 27. A gas is confined to a rigid container that cannot expand as heat energy is added to it. This process is A. isothermal. B. isochoric. * C. isobaric. D. adiabatic. 28. Convection can occur A. only in solids. B. only in liquids. C. only in gases. D. only in liquids and gases. * E. in solids, liquids, and gases. 29. A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper. The aluminum and the copper are touching each other. The specific heat capacity of aluminum is more than double that of copper. Eventually, the copper and the aluminum reach the same final temperature. Which of the following is true? A. The aluminum's temperature dropped more than the copper's temperature increased. B. The copper's temperature increased more than the aluminum's temperature dropped. C. The aluminum's temperature dropped just as much as the copper's temperature increased. D. It is impossible to determine the temperature changes without knowing the masses. * 30. Which of the following best explains why sweating is important to humans in maintaining suitable body temperature? A. Moisture on the skin increases thermal conductivity, thereby allowing heat to flow out of the body more effectively. B. Evaporation of moisture from the skin extracts heat from the body. * C. The high specific heat of water on the skin absorbs heat from the body. D. Functioning of the sweat glands absorbs energy that otherwise would go into heating the body. Distributed By: Tyrone G Carter TGC ...
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This note was uploaded on 08/29/2010 for the course PHYS 38234 taught by Professor Ramesh during the Spring '09 term at University of California, Berkeley.

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