Download Practice Final semester 2

1. A spacecraft is traveling at .9c. An astronaut in the craft observes 20 years pass on his
watch. How many years pass on earth?
2. A spacecraft is traveling at .9c. The length of the spacecraft is 500m when traveling at
.9c. What is the length when stationary?
3. If the current in a wire is 2.0 A and the potential difference across the wire is 10. V,
what is the wire's resistance ?
5.0 ohms 8.0 ohms 12 ohms 20 ohms
Base your answers to questions 25 through 28 on the circuit diagram below.
4.
The potential difference across R2 is
12 V 24 V 6.0 V 2.0 V
5.
The current through R1 is
2.0 A 4.0 A 0.5 A 8.0 A
6.
The equivalent resistance of the circuit is
3.0  16  24  4.0 
7.
The current through the ammeter is
2.0 A 4.0 A 0.5 A 8.0 A
8. As the distance between two point charges is tripled, the electostatic force between
the charges will become
1/9 as great 1/3 as great 3 times as great 9 times as great
9. If it takes 12 J of energy to move 2.0 C of charge through a lamp filament, the
potential difference across
the filament is
6.0 V 10 V 14 V 24 V
10.
A volt is defined as a
J/C J/s C/s J.s/C
11. An oil drop has a charge of -4.8 x 10-19 C. How many excess electrons does the oil
drop have ?
1.6 x 10-19 2.0 3.0 6.3 x 1018
12. How much energy is needed to move one electron through a potential difference of
100 volts ?
1.0 J 100 J 1.6 x 10-19 J 1.6 x 10-17 J
13. Moving a point charge of 3.2 x 10-19 C between points A and B in an electric field
requires 4.8 x 10-19 J of
energy. What is the potential difference between these two points ?
0.67 V 2.0 V 3.0 V 1.5 V
14. If the distance between two protons is tripled, then the force they exert on each
other, compared
to the original force, will be
one-ninth as great one-third as great three times as great nine times as great
15. If the distance between two point sources of equal charge is halved, the electrical
force between
the sources will be
halved doubled quartered quadrupled
16. Two point charges that are separated by a distance of 1.0 m repel each other with a
force equal
to 9.0 N. What is the force of repulsion when these two charges are 3.0 m apart ?
1.0 N 27 N 3.0 N 81 N
17. If the charge on one of two positively charged spheres is doubled, the electrostatic
force of
repulsion between the spheres will be
halved doubled quartered quadrupled
18. The diagram below shows a circuit with three resistors connected to a 15 V source.
What is the resistance of R2 ?
10  20  30  40 
19.
?
The diagram below shows a circuit with three resistors. What is the resistance of R3
6.0  2.0  12  4.0 
Base your answers to questions 22 through 24 on the circuit diagram below.
20.
The potential difference across R3 is
8.0 V 24 V 48 V 72 V
21.
The equivalent resistance in the circuit is
8.0  10.  1.5  50 
22.
The current running through R1 is
1.0 A 1.2 A 0.8 A 8.0 A
23. If three resistors of 3 ohms, 6 ohms, and 9 ohms are connected in parallel, the
combined resistance will be
greater than 9 ohms between 6 ohms and 9 ohms between 3 ohms and 6 ohms
less than 3 ohms
24. A 5 ohm and a 10 ohm resistor are connected in parallel. Compared to the current
in the 10 ohm resistor, the
current in the 5 ohm resistor will be
the same twice as great one-half as great one-third as great
25. If three resistors, each having a resistance of R ohms, are connected in parallel,
their equivalent resistance is
R ohms 2R ohms 3R ohms R/3 ohms
26. As additional resistors are connected in parallel to a source of constant voltage, the
current in the circuit
decrease increase remains the same
27.
Which circuit has an equivalent resistance of 6.0 ohms ?
2 ohm and 3 ohm resistors in series 2 ohm and 3 ohm resistors in parallel
three 2 ohm resistors in series three 2 ohm resistors in parallel
28. Three 10 ohm resistors are connected in parallel across a 9 V source. What is the
voltage drop across each resistor ?
9 V 10 V 90 V 3 V
29.
A 25 ohm and 50 ohm resistor are connected in parallel. Compared to the voltage
drop across the 25 ohm resistor,
the voltage drop across the 50 ohm resistor will be
the same twice as great one-half as great four times as great
Use the following information to answer questions 32 through 36
A parallel circuit has two branches, a 10 ohm resistor connected in parallel to a 20 ohm
resistor. The current in the 10 ohm resistor is 5.0 A.
30.
What is the voltage drop across the 10 ohm resistor ?
10 V 0.5 V 50 V 2 V
31.
What is the voltage drop across the 20 ohm resistor ?
10 V 0.5 V 50 V 2 V
32.
What is the current in the 20 ohm resistor ?
5.0 A 10 A 2.5 A 7.5 A
33.
What is the total current in the circuit ?
5.0 A 10 A 2.5 A 7.5 A
34.
What is the total resistance in the circuit ?
5 ohms 6.7 ohms 10 ohms 30 ohms
35. The diagram below shows a tuning fork vibrating in air. The dots represent air
molecules as the wave moves to the right.
Which diagram best represents the direction of motion of the air molecules ?
1 2 3 4
36. A periodic wave that has a frequency of 5.0 Hz and a speed of 10. m/s has a
wavelength of
50. m 2.0 m 0.50 m 0.20 m
37. The frequency of a water wave is 6.0 Hz. If the wave's wavelength is 2.0 m, then
the speed of the wave is
0.33 m/s 2.0 m/s 6.0 m/s 12 m/s
38. The maximum displacement of a particle from its rest position due to wave motion
is called
amplitude frequency wavelength period
39.
As the amplitude of a wave increases, the energy transported by the wave
decreases increases remains the same
40.
If the period of a wave is 2.0 s, its frequency is
0.50 Hz 2.0 Hz 4.0 Hz 5.0 Hz
41.
In a transverse wave, the medium vibrates
at right angles to wave velocity parallel to wave velocity in a circle around wave
velocity
42.
A pulse traveling in a spring transmits
energy only mass only
both energy and mass neither energy nor mass
43. A wave X meters long passes through a medium and has a speed of Y m/s. The
frequency of the wave
could be expressed as
Y/X Hz X/Y Hz XY Hz (X + Y) Hz
44. An observer is in front of a moving source of waves. Compared to the frequency
emitted by the source,
the frequency received by the observer will be
higher lower the same
45.
What is the phase difference, in degrees, between a crest and a trough ?
0 90 180 270
46. An opera singer's voice is able to break a thin crystal glass when the singer's voice
and the vibrating glass
have the same
frequency speed amplitude wavelength
47.
Which phenomenon is illustrated in question #15 ?
Doppler Effect phase resonance interference
48. An astronomer on Earth studying light coming from a star notes that the observed
light frequencies are lower than the actual emitted frequencies. The astronomer concludes
that the distance between the star and Earth is
decreasing increasing unchanging
49.
The diagram below shows the path of a wave passing through two media.
When the wave travels from medium A into medium B, its speed
decreases increases remains the same
50. In a ripple tank, waves travel from deep water into shallow water. The waves will
bend
toward the normal as they slow down toward the normal as they speed up
away from the normal as they slow down away from the normal as they speed up
51.
Refraction of a wave is caused by a change in the wave's
amplitude frequency speed phase
52. Which characteristic of a wave changes as the wave travels across a boundary
between two different media ?
frequency period phase speed
53.
The diagram below shows parallel rays of light incident on an irregular surface.
Which phenomenon of light is illustrated by the diagram ?
diffraction refraction regular reflection diffuse reflection
54.
A light ray is incident on a plane mirror as shown in the diagram below.
Which ray best represents the reflected ray ?
A B C D
55. A ray of light hits a mirror at an angle of incidence of 30o. What is the angle
between the incident and reflected rays ?
15o 30o 45o 60o
56. A person is standing 5 meters from a plane mirror. The chair in front of the person
is 2 meters from the mirror.
What is the distance between the person and the image he observes of the chair ?
7 m 2 m 3 m 10. m
Base your answers to questions 27 and 28 on the diagram below, which represents a
light ray traveling from air to Lucite
to medium Y and back into air.
57.
The sine of angle "X" is
0.333 0.500 0.707 0.886
58.
Light travels slowest in
air, only Lucite, only medium Y, only air, Lucite, and medium Y
59. The diagram below represents a ray of monochromatic light (f = 5.09 x 1014 Hz)
passing from
medium X (n = 1.46) into fused quartz.
Which path will the ray follow in the quartz ?
A B C D
60. A ray of monochromatic light is traveling in flint glass. The ray strikes the flint
glass-air interface at an angle
greater than the critical angle for flint glass. Which diagram best represents the path
of this light ray ?
(1) (2) (3) (4)
61. A ray of monochromatic light travels from air into a material whose index of
refraction is 1.4. What is
the speed of light in this material ?
2.1 x 108 m/s 3.0 x 108 m/s 1.4 x 108 m/s 2.5 x 108 m/s
62. The speed of light (f = 5.09 x 1014 Hz) in a transparent medium is 0.75 times its
speed in air.
The absolute index of refraction of the material is approximately
0.75 1.3 2,3 4.0
63. The separating of polychromatic light into its component frequencies as it passes
through a prism is called
interference diffraction diffusion dispersion
64.
When light enters a medium of higher refractive index, its velocity
decreases increases remains the same
65.
When light enters a medium of higher refractive index, its frequency
decreases increases remains the same
66.
When light enters a medium of higher refractive index, its wavelength
decreases increases remains the same
67.
In which of the following media is the speed of light greatest ?
water quartz crown glass diamond
68.
The critical angle is the angle of incidence for which the angle of refraction is
0o 30o 45o 90o
69.
Which color travels fastest through glass ?
violet blue orange red
70.
How long will it take light to travel a distance of 100. meters through air ?
3.00 x 10-10 s 3.00 x 108 s 3.33 x 10-7 s 3.33 x 107 s
71. A ray of light at an angle of incidence of 30o in air enters water. What will be the
angle of refraction
in the water ?
15o 22o 30o 38o
72.
You are reading words from a piece of paper. This is an example of
regular reflection diffraction refraction diffuse reflection
73. The diagram below shows straight wave fronts passing through an opening in a
barrier.
This wave phenomenon is called
reflection refraction polarization diffraction
74.
The diagram below shows two sources, A and B, vibrating in phase in the same
uniform medium and producing circular wave fronts.
Which phenomenon occurs at point P ?
destructive interference constructive interference reflection refraction
Questions 3 and 4 : A wave generator located 4.0 m from a reflecting wall produces a
standing wave in a string.
75.
If the speed of the wave is 10. m/s, what is its frequency ?
0.40 Hz 5.0 Hz 10. Hz 40. Hz
76.
How many nodes are there in the standing wave ?
2 3 4 5
77. The work required to move a charge of 0.04 C from one point to another in an
electric field is 200 J.
What is the potential difference between these two points ?
5000 V 2 x 10-4 V 8 V 200 V
78.
The spreading of a wave behind an obstacle is called
reflection refraction diffraction interference
79. Maximum constructive interference between two waves of the same frequency
could occur when their
phase difference is one wavelength phase difference is 1/2 wavelength
phase difference is 3/2 wavelength phase difference is 1/4 wavelength
80. Light from the star Betelgeuse displays a Doppler red shift. This shift is best
explained by assuming that Betelgeuse is
decreasing in temperature increasing in temperature moving toward Earth
moving away from Earth
81.
In a vacuum, all electromagnetic waves have the same
wavelength frequency speed amplitude
82.
Compared to the wavelength of red light, the wavelength of yellow light is
shorter longer the same
83.
Which of the following colors has the lowest frequency ?
red yellow blue violet
84. What is the wavelength of X-rays with a frequency of 1.5 x 1018 Hz traveling in a
vacuum ?
4.5 x 1026 m 2.0 x 10-10 m 5.0 x 10-10 m 5.0 x 109 m
85.
?
Which of the following forms of electromagnetic energy has the highest frequency
radio ultraviolet infrared visible light
86. In a double-slit experiment, which color will produce the largest distance between
maxima ?
red yellow blue violet
87.
Which phenomenon can occur with light, but not with sound ?
interference polarization refraction the Doppler effect
88.
The fact that light can be polarized lead to the conclusion that light is a
particle compressional wave torsional wave transverse wave
89.
Sound waves cannot be
refracted diffracted reflected polarized
90.
The phenomenon observed in a double-slit experiment are caused by
reflection and refraction reflection and polarization diffraction and interference
diffraction and polarization
91.
Which characterizes a polarized wave ?
vibrating in all directions vibrating at random vibrating in one plane vibrating in
circles
92.
In the diagram below, the distance between points A and B on a wave is 5.0 m.
The wavelength of this wave is
1.0 m 2.0 m 5.0 m 4.0 m
93. The diagram below shows a tuning fork vibrating in air. The dots represent air
molecules as the wave moves to the right.
Which diagram best represents the direction of motion of the air molecules ?
1 2 3 4
94. A periodic wave that has a frequency of 5.0 Hz and a speed of 10. m/s has a
wavelength of
50. m 2.0 m 0.50 m 0.20 m. The frequency of a water wave is 6.0 Hz. If the
wave's wavelength is 2.0 m, then the speed of the wave is
0.33 m/s 2.0 m/s 6.0 m/s 12 m/s
95. The maximum displacement of a particle from its rest position due to wave motion
is called
amplitude frequency wavelength period
96.
As the amplitude of a wave increases, the energy transported by the wave
decreases increases remains the same
97.
If the period of a wave is 2.0 s, its frequency is
0.50 Hz 2.0 Hz 4.0 Hz 5.0 Hz
98.
In a transverse wave, the medium vibrates
at right angles to wave velocity parallel to wave velocity in a circle around wave
velocity
99.
A pulse traveling in a spring transmits
energy only mass only
both energy and mass neither energy nor mass
100. A wave X meters long passes through a medium and has a speed of Y m/s. The
frequency of the wave
could be expressed as
Y/X Hz X/Y Hz XY Hz (X + Y) Hz
101. An observer is in front of a moving source of waves. Compared to the frequency
emitted by the source,
the frequency received by the observer will be
higher lower the same
102.
What is the phase difference, in degrees, between a crest and a trough ?
0 90 180 270
103. An opera singer's voice is able to break a thin crystal glass when the singer's voice
and the vibrating glass
have the same
frequency speed amplitude wavelength
104.
Which phenomenon is illustrated in question #1?
Doppler Effect phase resonance interference
105. An astronomer on Earth studying light coming from a star notes that the observed
light frequencies are lower than the
actual emitted frequencies. The astronomer concludes that the distance between the
star and Earth is
decreasing increasing unchanging
106.
You are reading words from a piece of paper. This is an example of
regular reflection diffraction refraction diffuse reflection
107. The diagram below shows straight wave fronts passing through an opening in a
barrier.
This wave phenomenon is called
reflection refraction polarization diffraction
108.
The diagram below shows two sources, A and B, vibrating in phase in the same
uniform medium and producing circular wave fronts.
Which phenomenon occurs at point P ?
destructive interference constructive interference reflection refraction
109.
In a vacuum, all electromagnetic waves have the same
wavelength frequency speed amplitude
110.
Compared to the wavelength of red light, the wavelength of yellow light is
shorter longer the same
111.
Which of the following colors has the lowest frequency ?
red yellow blue violet
112. A monochromatic beam of light has a frequency of 6.5 x 1014 Hz. What color is
the light ?
yellow orange violet blue
113. What is the wavelength of X-rays with a frequency of 1.5 x 1018 Hz traveling in a
vacuum ?
4.5 x 1026 m 2.0 x 10-10 m 5.0 x 10-10 m 5.0 x 109 m
114. Which of the following forms of electromagnetic energy has the highest
frequency ?
radio ultraviolet infrared visible light
115.
Which phenomenon can occur with light, but not with sound ?
interference polarization refraction the Doppler effect
116.
The fact that light can be polarized lead to the conclusion that light is a
particle compressional wave torsional wave transverse wave
117.
Sound waves cannot be
refracted diffracted reflected polarized
118.
The phenomenon observed in a double-slit experiment are caused by
reflection and refraction reflection and polarization diffraction and interference
diffraction and polarization
119.
Which characterizes a polarized wave ?
vibrating in all directions vibrating at random vibrating in one plane vibrating in
circles
120. If you shine laser light at a penny and project the image on the wall, you will
notice a bright spot
directly behind the penny. This can be explained by assuming that the light waves
experienced
diffraction only interference only diffraction and interference
refraction only
121.
What are the amplitude and wavelength of the wave shown below ?
amplitude = 0.10 m, wavelength = 0.30 m amplitude = 0.10 m, wavelength = 0.60
m
amplitude = 0.20 m, wavelength = 0.30 m amplitude = 0.20 m, wavelength = 0.60
m
122. The diagram below shows two waves, A and B. The phase difference between A
and B is
0o 45o 90o 180o
123. The periodic wave in the diagram below has a frequency of 40. Hz. What is the
speed of the wave ?
13 m/s 27 m/s 60. m/s 120 m/s
124. When a transverse wave is moving through a medium, what is the action of the
particles of the medium ?
They travel through the medium with the wave.
They vibrate parallel to the direction the wave is moving.
They vibrate perpendicular to the direction the wave is moving.
They remain at rest.
125.
If the period of a wave is doubled, its wavelength will be
halved doubled unchanged quartered
155.
If the frequency of a sound wave is 400 Hz, its period is closest to
2.27 x 10-3 s 0.75 s 1.33 s 3.31 x 102 s
126. A car's horn is blowing as the car moves at a constant velocity toward an observer.
Compared to the frequency of
the sound wave emitted by the horn, the observed frequency is
constant and lower constant and higher the same varying and lower
127. The change in the direction of a wave when it passes obliquely from one medium
to another is called
diffraction interference reflection refraction
128.
Which wave phenomenon could not be demonstrated with a single wave pulse ?
standing wave diffraction reflection refraction
129.
As a wave enters a medium, there may be a change in the wave's
frequency speed period phase
130.
As a wave is refracted, which characteristic of the wave will remain unchanged ?
velocity wavelength frequency direction
131.
The number of water waves passing a given point each second is the wave's
wavelength amplitude frequency velocity
132. Sound waves with a constant frequency of 250 Hz are traveling through air at
STP. What is their wavelength ?
0.76 m 1.3 m 250 m 83,000 m
133.
What is the frequency of a wave with a period of 0.005 s ?
5 Hz 100 Hz 200 Hz 2000 Hz
134.
What is the wavelength of a 30 Hz periodic wave moving at 60 m/s ?
0.50 m 2.0 m 20. m 1800 m
135. Two waves have the same frequency. Which wave characteristic must also be
identical for both waves ?
phase amplitude intensity period
136. If the frequency of a sound wave remains constant, its energy can be varied by
changing its
amplitude speed wavelength period
137.
In which type of wave is the disturbance parallel to the direction of wave travel ?
torsional longitudinal transverse circular
138. A driver of a car hears the siren of an ambulance which is moving away from her.
If the actual frequency of the siren is 2000 Hz, the frequency heard by the driver may be
1900 Hz 2000 Hz 2100 Hz 4000 Hz
139.
In order for standing waves to form in a medium, two waves must
have the same frequency have different amplitudes
have different wavelengths
travel in the same direction
140. A ray of monochromatic light traveling in air enters a rectangular glass block
obliquely and strikes a plane mirror
at the bottom. Then the ray travels back through the glass and strikes the air-glass
interface. Which diagram below
best represents the path of this light ray ? [N represents the normal to the surface.]
141. A ray of monochromatic light (f = 5.09 x 1014 Hz) traveling in air is incident on an
interface with a liquid (n = 1.4)
at an angle of 45o, as shown in the diagram below.
The angle of refraction for the light ray is closest to
10o 20o 30o 40o