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Physics Second Semester Exam
In the space to the left, write the letter of the answer to each question
____ 1. Bits of paper stick to a plastic comb that has been rubbed because of
____ 2. An important difference between insulators and conductors is that in conductors
____ 3. When electrons are transferred from one object to another, positive and negative charges
are
____ 4. The force that charge q1 exerts on q2 is opposite and _______ the force that charge q2
exerts on q1.
___ 5. An electric field is equal to
___ 6. The strength of the force on a charge in an electric field depends on
___ 7. In a uniform electric field, the potential difference between two points is found using the
equation
___ 8. Touching an object to the Earth to eliminate excess electrical charge is
___ 9. The charges on a hollow conductor are found
___ 10. A capacitor is
___11. If there are four electrical devices connected in series, then the number of paths is equal
to
___12. If three resistors are connected in parallel, there are ___________ current paths in the
circuit.
___13. An ammeter is connected in _______ and a voltmeter is connected in _______.
___14. An ampere is a
___15. Compared to thin wires, electrical resistance in thick wires is
___16. Electrical resistance is measured in
___17. The current flowing through a circuit is always increases by
___18. The units for a volt are
___19. The units for an Ampere are
___20. When resistors are placed in parallel with each other, the total resistance is
___21. As more lamps are placed in a series circuit, the overall current
___22. Electrical elements in our home are connected in
____23. Energy is measured in
____24. A positive charge of 3.6 x 10-5 C and a negative charge of – 2.4 x 10-5 C are 0.034m
apart. What is the force between the two particles?
____25. A 15 volt battery is connected to a flashlight. If 3 coulombs of electricity pass through
the wire from one terminal to the other, how much energy is available for the light?
____26. What is the current that passes through a 3  resistor connected to a 24 V power
supply?
___27. A 36  resistor is connected to a 120 V power supply. What is the current?
____28. A 8and a 9 resistor are connected in parallel across a 50 V power source. What is
the equivalent resistance in the circuit?
____29. A 8and a 9 resistor are connected in parallel across a 50 V power source. What is
the total current in the circuit?
___ 30. A 15 and a 36 resistors are attached in series to a 50V power supply. What is the
equivalent resistance?
 A 15 and a 36 resistors are attached in series to a 50V power supply. What is the
total current?
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___32. As an approaching ambulance passes an unmoving observer, what happens to the
apparent
pitch of the sound emitted by the ambulance siren, as heard by the observer?
__33. The speed of any mechanical wave depends on _____.
___34. Echoes demonstrate which behavior of sound waves?
___35. Sound is an example of what kind of wave?
___36. The time interval during which wave motion repeats is the _____.
Omit question 37 to 59.
37. A convex mirror with a focal length of –20.0 cm forms an image 12 cm behind the surface. Where is
the
object as measured from the surface?
____ 38. Which best describes the image of a concave mirror when the object’s distance from the mirror
is less than the focal-point distance?
____39. When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray
strikes the mirror’s surface, the angles of incidence and reflection are measured from the normal and
____ 40. If a light ray strikes a flat mirror at an angle of 27° from the normal, the reflected ray will be
____ 41. If you stand 3.0 m in front of a flat mirror, how far away from you would your image be in the
mirror?
____ 42. A concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its
principal axis. How far from the mirror is the corresponding object?
____43. A concave mirror forms a real image at 25 cm from the mirror surface along the principal axis.
If the corresponding object is at a 10.0 cm distance, what is the mirror’s focal length?
____ 44. Which portion of the electromagnetic spectrum is used in a microscope?
____ 45 If you know the wavelength of any form of electromagnetic radiation, you can determine its
frequency because
____46. The image of an object in a flat mirror is always
____47. When two parallel mirrors are placed so that their reflective sides face one another, ____
images form. This is because the image in one mirror becomes the ____ for the other mirror.
____ 48. When the reflection of an object is seen in a flat mirror, the distance from the mirror to the
image depends on
____ 49. If a virtual image is formed 10.0 cm along the principal axis from a convex mirror with a focal
length of –15.0 cm, what is the object’s distance from the mirror?
____ 50. Which portion of the electromagnetic spectrum is used in a television?
____ 51. Which portion of the electromagnetic spectrum is used in aircraft navigation?
____ 52. Which portion of the electromagnetic spectrum is used to identify fluorescent minerals?
____ 53. What is the wavelength of microwaves of 3.0 × 109 Hz frequency?
____ 54. What is the frequency of an electromagnetic wave with a wavelength of 1.0 × 105 m?
____ 55. Yellow-green light has wavelength of 560 m. What is its frequency?
____ 56. In a vacuum, electromagnetic radiation of short wavelengths.
____ 57. When red light is compared with violet light,
____ 58. The farther light is from a source,
____ 59. If you are reading a book and you move twice as far away from the light source, how does the
brightness at the new distance compare with that at the old distance? It is
____ 60. Snow reflects almost all of the light incident upon it. However, a single beam of light is not
reflected in the form of parallel rays. This is an example of ____ reflection off of a ____ surface.
____ 61. A highly polished finish on a new car provides a ____ surface for ____ reflection.
____ 62. Which of the following is the time it takes to complete a cycle of motion?
____ 63 Which of the following is the number of cycles or vibrations per unit of time?
____ 64. How are frequency and period related in simple harmonic motion?
____ 65. An amusement park ride has a frequency of 0.05 Hz. What is the ride’s period?
Allen
____ 66. An amusement park ride swings back and forth once every 40.0 s. What is the ride’s frequency?
____ 67. One end of a taut rope is fixed to a post. What type of wave is demonstrated if the free end is
quickly raised
and lowered?
____ 68. In the waveform of the longitudinal wave shown above, the compressed regions correspond to
____ 69. In the waveform of the longitudinal wave shown above, the stretched regions correspond to
____ 70. A periodic wave has a wavelength of 0.50 m and a speed of 20 m/s. What is the wave
frequency?
____ 71. A musical tone sounded on a piano has a frequency of 410 Hz and a wavelength of 0.80 m.
What is the speed of the sound wave?
____ 72. A radio wave has a speed of 3.00 × 108 m/s and a frequency of 107 MHz. What is the
wavelength?
____ 73. Bats can detect small objects, such as insects, that are approximately the size of one wavelength.
If a bat emits a chirp at a frequency of 60.0 kHz and the speed of sound waves in air is 330 m/s, what is
the size of the smallest insect that the bat can detect?
____ 74. Waves propagate along a stretched string at a speed of 8.0 m/s. The end of the string vibrates up
and down once every 1.5 s. What is the wavelength of the waves traveling along the string?
____ 75. What happens to the energy carried in a given time interval by a mechanical wave when the
wave’s amplitude is doubled?
____76. What happens to the energy carried in a given time interval by a mechanical wave when the
wave’s amplitude is halved?.
____ 77. Two waves can occupy the same space at the same time because waves
____ 78. The superposition of mechanical waves can be observed in the movement of
____ 79. Which of the following types of interference will occur in the figure above?