Unformatted text preview: Physics Honors Distributed By: Tyrone G Carter 1. A light ray, traveling parallel to a converging mirro`r'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. 2. White light is
A. light of wavelength 550 nm, in the middle of the visible spectrum.
B. a mixture of all visible frequencies.
C. a mixture of red, green, and blue light.
D. the term used to describe very bright light.
E. the opposite (or complementary color) of black light. 3. If you stand in front of a diverging mirror, at the same distance from it as its radius of
A. you won't see your image because there is none.
B. you won't see your image because it's focused at a different distance.
C. you will see your image and you will appear smaller.
D. you will see your image and you will appear larger.
E. you will see your image at your same height. 4. What color does blue pigment definitely subtract from white light?
E. None of these. 5. When red light and green light shine on the same place on a piece of white paper, the spot
appears to be
E. None of these. 6. Is it possible to see a virtual image?
A. No, since the rays that seem to emanate from a virtual image do not in fact
emanate from the image.
B. No, since virtual images do not really exist.
C. Yes, the rays that appear to emanate from a virtual image can be focused on the
retina of the eye.
D. Yes, since almost everything we see is virtual because most things reflect light
coming from some other source.
E. None of the above is true. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 7. 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. None of these are true. 8. Light arriving at a converging mirror after first passing through the focal point is
A. back parallel to the axis.
B. back on itself.
C. through the focal point.
D. through the center of curvature.
E. Not covered in the assigned reading. 9. A plane mirror forms an image that is
A. real and upright.
B. virtual and upright.
C. real and upside down.
D. virtual and upside down.
E. Not covered in the assigned reading. 10. If you looked at a light through the lenses from two polarizing sunglasses that were
overlapped at right angles to one another, __________ of the light would pass through.
E. Not covered in the assigned reading. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 1. An object is placed a far behind a converging lens. The image you see is
A. upside-down and large
B. rightside-up and large
C. upside-down and small
D. rightside-up and small
E. None of these. 2. An object is placed a large distance (greater than the focal length) from a diverging lens.
The image formed is
A. virtual and erect.
B. virtual and inverted.
C. real and erect.
D. real and inverted.
E. None of these. 3. For a thin converging spherical lens, the focal length of red light compared to the focal
length of blue light is
C. the same.
D. More than one of these may be true.
E. Not covered in the assigned reading. 4. An object is placed between a converging lens and its focal point. The image formed is
A. virtual and erect.
B. virtual and inverted.
C. real and erect.
D. real and inverted.
E. real and virtual. 5. Lenses that are thicker at the edges than at the center
A. cause light rays to spread out.
B. bend light rays to a a focal point.
C. have no effect on light rays.
D. reflect light rays back.
E. Not covered in the assigned reading. 6. When light passes at an angle to the normal from one material into another material in
which its speed is lower,
A. it is bent toward the normal to the surface.
B. it always lies along the normal to the surface.
C. it is unaffected.
D. it is bent away from the normal to the surface.
E. it is totally reflected. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 7. 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 less than 48.8° will be
B. totally reflected.
C. partially reflected and transmitted.
D. totally transmitted.
E. polarized. 8. The index of refraction of diamond is 2.42. This means that a given frequency of light
A. 2.42 times faster in air than it does in diamond.
B. 2.42 times faster in diamond than it does in air.
C. 2.42 times faster in vacuum than it does in diamond.
D. 2.42 times faster in diamond than it does in vacuum.
E. Not covered in the assigned reading. 9. The earth's atmosphere causes sunlight to refract before it strikes the Earth's surface. At
both sunrise and sunset, light from the sun strikes the Earth's atmosphere at large angles
of incidence. If this atmospheric refraction did not occur, how would the apparent time
of sunrise and sunset be changed?
A. Both would be later.
B. Both would be earlier.
C. Sunrise would be later, and sunset would be earlier.
D. Sunrise would be earlier, and sunset would be later. 10. An index of refraction less than one for a medium would mean that
A. the speed of light in the medium is the same as the speed of light in air.
B. the speed of light in the medium is greater than the speed of light in air.
C. refraction is not possible.
D. reflection is not possible.
E. the speed of light in the medium is less than the speed of light in air. Distributed By: Tyrone G Carter TGC Physics Honors 1. Distributed By: Tyrone G Carter In diffraction from a diffraction grating, the central bright spot is ____________ the other
A. only a little brighter than
B. about as wide as
C. about twice as wide as
D. much more narrow than
E. the same size as 2. When you look at a single slit diffraction pattern produced on a screen by light of single
wavelength, there is a bright spot in the center of the screen and a number of other bright
spots on either side. The brightness of the other spots decreases with the distance from
the central spot. If the wavelength of the light is increased
A. the pattern gets more narrow (the center spot is smaller, and the other spots move
B. the pattern increases in width (the center spot is bigger, and the other spots
move farther apart).
C. the pattern does not change.
D. the center spot gets wider, but the other spots do not change in position or width.
E. the center spot gets more narrow, but the other spots do not change in position or
width. 3. A soap film is being viewed in white light. As the film becomes very much thinner than
the wavelength of blue light, the film
A. appears black because it reflects no visible light.
B. appears white because it reflects all wavelengths of visible light.
C. appears blue since all other colors are transmitted.
D. appears red since all other colors are transmitted.
E. appears black because it reflects no light of any type. 4. At the second bright spot on either side of the central bright spot in a double-slit
experiment, light from
A. each opening travels the same distance.
B. one opening travels twice as far as light from the other opening.
C. one opening travels one wavelength of light farther than light from the other
D. one opening travels two wavelengths of light farther than light from the other
E. None of these. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 5. The colors on an oil slick or a soap film are caused by interference and
E. None of these. 6. Consider two diffraction gratings; one has 4000 lines/cm and the other one has 6000
lines/cm. Which of the following is true?
A. The 4000-line grating produces bright spots that are more spread out.
B. The 6000-line grating produces bright spots that are more spread out.
C. The gratings spread the light out the same, but the spots are smaller and brighter
for the 4000-line grating.
D. The gratings spread the light out the same, but the spots are smaller and brighter
for the 6000-line grating.
E. None of these. 7. The separation between adjacent bright spots in a double-slit interference pattern using
monochromatic light is
A. greatest for red light.
B. greatest for green light.
C. greatest for blue light.
D. the same for all colors.
E. None of these. 8. In single-slit diffraction, the central bright spot is ____________ the other bright spots.
A. only a little brighter than
B. about as wide as
C. about twice as wide as
D. much more narrow than
E. the same size as 9. What principle is responsible for light spreading as it passes through a narrow slit?
E. None of these. 10. One beam of coherent light travels from point P to point Q. Another coherent beam
travels from point R to point Q. If these two beams are to interfere destructively, the
distance PQ must be different from the distance RQ by an amount equal to
A. a half-wavelength.
C. one wavelength.
D. a quarter-wavelength.
E. None of these. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 1. The process of charging a conductor by bringing it near another charged object and then
grounding the conductor is called
A. charging by contact.
B. charging by induction.
C. charging by polarization
E. None of these. 2. Electric field lines
A. circle clockwise around positive charges.
B. circle counter-clockwise around positive charges.
C. spread outward from all charges.
D. spread outward from positive charges.
E. spread outward from negative charges. 3. 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
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. 4. An electron and a proton are separated by a distance of 1 m. The electron is moved 0.5 m
closer to the proton. The force between them _______ to _________ its original value.
A. increases; sixteen times
B. increases; four times
C. increases; twice
D. decreases; one-half
E. decreases; one-fourth 5. An uncharged metal sphere is placed on a frictionless, insulating surface. A rod with
charge q is moved horizontally toward the sphere but does not touch it. As the rod
approaches the sphere, the sphere
A. remains at rest.
B. moves toward the rod.
C. moves away from the rod.
D. moves at a right angle to the motion of the rod.
E. moves vertically upward off of the surface. 6. If a conductor is in electrostatic equilibrium, any excess charge
A. is evenly distributed on the conductor's outer surface.
B. resides entirely on the conductor’s outer surface.
C. resides entirely in the conductor’s interior.
D. resides entirely at the center of the conductor.
E. More than one of these is correct. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 7. A point charge of +Q is placed at the center of a square. When a second point charge -Q
is placed at one of the square's corners, it is observed that an electrostatic force of 2 N
acts on the positive charge at the square's center. Now, identical charges of -Q are placed
at the other three corners of the square. What is the magnitude of the net electrostatic
force acting on the positive charge at the center of the square?
A. 0 N
B. 2.8 N
C. 4 N
D. 8 N
E. Not covered in the assigned reading. 8. A cubic block of aluminum metal 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
D. the same as that of the bottom surface.
E. the same as that of all the other surfaces. 9. A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a
positive charge and the silk
A. also acquires a positive charge.
B. acquires a negative charge.
C. remains neutral.
D. acquires neutrons.
E. None of these. 10. Object A is made of an insulator and has a charge of 20 C. Object B is made of an
insulator and has a charge of 10 C. Objects A and B touch briefly. How much charge
does Object A have afterwards?
A. 30 C
B. 20 C
C. 15 C
D. 10 C
E. 5 C Distributed By: Tyrone G Carter TGC Physics Honors Physics Honors Distributed By: Tyrone G Carter Chapter 18 Quiz 1. Doubling the capacitance of a capacitor holding a constant charge causes the energy
stored in that capacitor to
C. decrease to one half of its previous value.
D. decrease to one fourth of its previous value.
E. None of these. 2. When a positive charge is released and freely moves along an electric field line, it moves
to a position of
A. lower electric potential and lower potential energy.
B. lower electric potential and higher potential energy.
C. higher electric potential and lower potential energy.
D. higher electric potential and higher potential energy.
E. greater electric field magnitude. 3. 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
A. Object A
B. Object B
C. Both are at the same potential.
D. Cannot be determined.
E. None of these. 4. The plates of a parallel-plate capacitor are maintained with constant voltage by a battery
as they are pulled apart. What happens to the strength of the electric field during this
A. It increases.
B. It decreases.
C. It remains constant.
D. There is no way to tell from the information given.
E. Not covered in the assigned reading. 5. 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?
E. None of these. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 6. The plates of a parallel-plate capacitor are maintained with constant voltage by a battery
as they are pulled apart. During this process, the amount of charge on the plates must
C. remain constant.
D. There is no way to tell from the information given.
E. Not covered in the assigned reading. 7. A dielectric material such as paper is placed between the plates of a capacitor. What
happens to the capacitance?
A. The capacitance does not change.
B. The capacitance becomes larger.
C. The capacitance becomes smaller.
D. The capacitance becomes infinite.
E. Not covered in the assigned reading. 8. A positive electric charge is moved at a constant speed between two locations in an
electric field, with no work done by or against the electric field at any time during the
motion. This situation can occur only if the charge moves
A. in the direction of the electric field.
B. opposite the direction of the electric field.
C. perpendicular to an equipotential line.
D. along an equipotential line.
E. in a uniform electric field. 9. Consider a uniform electric field of 50 N/C directed toward the east. If the voltage
measured relative to ground at a given point is 80 V, what is the voltage at a point 1 m
directly west of that point?
A. 30 V
B. 80 V
C. 130 V
D. 50 V
E. None of these 10. 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. 0 V
B. 3 V
C. 9 V
D. 12 V
E. Not covered in the assigned reading. Distributed By: Tyrone G Carter TGC Physics Honors Physics Honors Distributed By: Tyrone G Carter Quiz: Chapters 19-20 1. Which of the following characteristics of a material does NOT affect its resistance?
C. the type of material
E. All of these affect the resistance. 2. Which of the following is true?
A. Electrons move in the same direction as the conventional current.
B. Electrons in a current move at nearly the speed of light.
C. Current is measured in ohms.
D. The resistance of a device may not be inversely proportional to the current
through the device.
E. All materials obey Ohm's law. 3. Which of the following copper wires would have the LEAST resistance?
A. length = 10 cm; temperature = 32°C
B. length = 10 cm; temperature = 10°C
C. length = 5 cm; temperature = 32°C
D. length = 5 cm; temperature = 10°C
E. All of these wires have the same resistance. 4. How does the potential difference across the resistor bulb in a flashlight compare with the
terminal voltage of the batteries used to power the flashlight?
A. The potential difference is greater than the terminal voltage.
B. The potential difference is less than the terminal voltage.
C. The potential difference is equal to the terminal voltage.
D. It cannot be determined unless the internal resistance of the batteries is known.
E. Not covered in the assigned reading. 5. Which process will double the power dissipated by a resistor?
A. doubling the current while doubling the resistance
B. doubling the current and making the resistance half as big
C. doubling the current and doubling the potential difference
D. doubling the current while making the potential difference half as big
E. Not covered in the assigned reading. 6. As more resistors are added in series to a constant voltage source, the power supplied by
C. does not change.
D. increases for a time and then starts to decrease.
E. None of these are true. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 7. A 14 A current flows into a parallel combination of a 3- and a 4- resistor. What
current flows through the 3- resistor?
A. 8 A
B. 7 A
C. 6 A
D. 3 A
E. 4 A 8. Three identical resistors are connected in parallel to a battery. If the current of 12 A
flows from the battery, how much current flows through any one of the resistors?
A. 12 A
B. 4 A
C. 36 A
D. 3 A
E. None of these. 9. 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. None of these are true. 10. Three identical resistors are connected in series to a 12-V battery. What is the voltage
across any one of the resistors?
A. 36 V
B. 12 V
C. 4 V
D. 3 V
E. None of these. Distributed By: Tyrone G Carter TGC Physics Honors Physics Honors Distributed By: Tyrone G Carter Chapter 21 Quiz 1. A positively charged particle has a downward velocity at point P. The magnetic force on
the particle at this point is toward the south. This data indicates that at point P there is a
magnetic field component that points
A. toward the north.
C. toward the south.
D. toward the east.
E. toward the west. 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 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 forces
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. Two of these are correct. 4. A solenoid is in an upright position on a table. A counterclockwise current (as seen from
above) causes the solenoid to have a(n) ___ magnetic pole at its bottom end. If a
compass is placed at the top of the solenoid, the north pole of the compass would be ___.
A. north; attracted
B. south; attracted
C. north; repelled
D. south; repelled
E. Not covered in the assigned reading. 5. A charged particle is injected into a uniform magnetic field such that its velocity vector is
perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will
A. in a straight line.
B. in a spiral path.
C. in a circular path.
D. in a parabolic path.
E. to a stop. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 6. One reason why we know magnetic fields are not the same as electric fields is because
the force exerted on a charge +Q is...
A. in opposite directions in electric and magnetic fields.
B. in the same direction in electric and magnetic fields.
C. parallel to an electric field and perpendicular to a magnetic field.
D. parallel to an magnetic field and perpendicular to a electric field.
E. zero in both if the charge is not moving. 7. At a particular instant, a proton moves eastward at speed v in a uniform magnetic field
that is directed straight downward. The magnetic force that acts on it is
B. directed upward.
C. directed to the south.
D. none of these. 8. At any point the magnetic field lines are in the direction of
A. the magnetic force on a moving positive charge
B. the magnetic force on a moving negative charge
C. the velocity of a moving positive charge
D. the velocity of a moving negative charge
E. None of these. 9. By using a compass to measure the magnetic field direction at various points near a long,
straight current-carrying wire, you can show that the wire's magnetic field lines are
A. straight lines in space that go from one magnetic charge to another.
B. straight lines in space that are parallel to the wire.
C. straight lines in space that are perpendicular to the wire.
D. circles that have their centers on the wire and lie in planes perpendicular to the
E. circles that have the wire lying along a diameter of the circle. 10. You are facing north. A wire is carrying current directly toward you. Point P is
horizontally east of the wire. The direction of the magnetic field at point P is
E. toward you. Distributed By: Tyrone G Carter TGC Physics Honors Physics Honors Distributed By: Tyrone G Carter Chapter 22 Quiz 1. 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
E. 90 V 2. A circular coil lies flat on a horizontal table. A bar magnet is held above its center with
its north pole pointing down, and released. As the magnet falls, the induced current in
the coil generates a magnetic field which exerts ________ on the magnet.
A. an upward force
B. a downward force
C. a sideways force
D. no force
E. None of these are true. 3. A coil lies flat on a level table top in a region where the magnetic field vector points
straight up. The magnetic field suddenly grows stronger. When viewed from above,
what is the direction of the induced current in this coil as the field increases?
E. There is no induced current. 4. A circular coil lies flat on a horizontal table. A bar magnet is held above its center with
its north pole pointing down, and released. As it approaches the coil, the falling magnet
induces (when viewed from above)
A. no current in the coil.
B. a clockwise current in the coil.
C. a counterclockwise current in the coil.
D. an upward current in the coil.
E. a downward current in the coil. 5. The primary of a transformer has 100 turns and its secondary has 200 turns. If the input
current at the primary is 100 A, we can expect the output current at the secondary to be
A. 50 A
B. 100 A
C. 200 A
D. 25 A
E. None of these. Distributed By: Tyrone G Carter TGC Physics Honors Distributed By: Tyrone G Carter 6.
An inductor solenoid 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. 7. 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 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. 8. Which statement is correct?
A. The magnetic field of an induced current opposes the applied magnetic field.
B. According to the principle of energy conservation, an induced field attempts to
keep the total field strength constant.
C. An induced electric field opposes an applied magnetic field.
D. Lenz’s law is used to find the average induced emf.
E. All of the above are true. 9. In a transformer, the current in the secondary is maximum at the moment that which
condition is met in the primary?
A. the current is maximum in positive direction
B. the current is maximum in negative direction
C. the rate of current change is maximum
D. the voltage is maximum in a positive direction
E. Not covered in the assigned reading. 10. A current may be induced in a coil by
A. moving one end of a bar magnet through the coil.
B. moving the coil toward one end of a bar magnet.
C. holding the coil near a second coil while the electric current in the second coil is
D. all of the above.
E. none of the above. 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 Berkeley.
- Spring '09