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Semester I : Test III: Module 4: Waves and Oscillations

Total questions: 100

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

Which wave in the diagram has the greatest wavelength?

a)

1

b)

2

c)

3

d)

4

2.
An object is attached to a vertical spring and bobs up and down between points A and B.  Where is the object located when its kinetic energy is a maximum?
a)
at either A or B
b)
midway between A and B
c)
one-third of the way between A and B
d)
one-fourth of the way between A and B
3.
An object attached to an ideal spring executes simple harmonic motion. If you want to double its total energy, you could
a)
double the amplitude of vibration
b)
double the force constant (spring constant) of the spring
c)
double both the amplitude and force constant (spring constant).
d)
double the mass
4.
An ideal spring with a constant of 200 N/m is acted upon by a 500 N force directed in the positive direction.  What is the magnitude and direction of the displacement?
a)
0.4 m
b)
-0.4 m
c)
2.5 m
d)
-2.5 m
5.
A pendulum is 0.75 meters long and has a period of 4.17 seconds. The Pendulum is on an unknown planet.  What is the gravity of the Unknown Planet?
a)
9.8
b)
3.4
c)
1.7
d)
Greater than 9.8
6.

An object attached to one end of a spring makes 20 complete vibrations in 10s. Its period is:

a)

0.50 s

b)

2 s

c)

0.5 Hz

d)

2 Hz

7.

What property of the wave is represented by the letter "B"?

a)

amplitude

b)

crest

c)

trough

d)

wavelength

8.

The number of wavelengths that pass a point each per second is:

a)

frequency

b)

period

c)

longitudinal

d)

transverse wave

9.

What is common with all electromagnetic and mechanical waves?

a)

They travel at the same speed

b)

They transfer energy

c)

They are all longitudinal waves

d)

They are all transverse waves

10.

Sound is an example of a

a)

transverse wave

b)

longitudinal wave

c)

focal wave

d)

electromagnetic wave

11.

Maximum displacement from equilibrium position is called

a)

trough

b)

crest

c)

amplitude

d)

equilibrium

12.

What fact is FALSE about standing waves?

a)

They are created through wave interference

b)

They occur both on strings and in tubes

c)

They only apply to sound waves

d)

They only occur at certain frequencies

13.

When is the pendulum at maximum velocity

a)

At its lowest point

b)

At its highest point

c)

It moves at a constant velocity

d)

It is at rest

14.

When does the mass move at maximum velocity in a mass-spring system?

a)

At equilibrium

b)

At the farthest point from the equilibrium

c)

At its hightest point

d)

At its lowest point

15.

What are the two requirements for a simple harmonic oscillator?

a)

The object vibrates about the equilibrium point and the restoring force is proportional to the displacement

b)

The object moves left to right and the restoring force is proportional to the displacement

c)

The object vibrates about the equilibrium and the restoring force is greater than the displacement

d)

The object moves left to right and the restoring force is greater than the displacement

16.

When is the pendulum at 0 velocity

a)

At its lowest point

b)

At its highest point

c)

It moves at a constant velocity

d)

It is at rest

17.

When does the mass move at 0 velocity in a mass-spring system?

a)

At equilibrium

b)

At the farthest point from the equilibrium

c)

At its hightest point

d)

At its lowest point

18.

A pendulum oscillates as shown. At which of the following positions is the kinetic energy equal to the total energy?

a)

A

b)

B

c)

C

d)

Not enough information given.

19.

The frequency of a body moving with simple harmonic motion is doubled. If the amplitude remains the same, which one of the following is also doubled?

a)

the time period

b)

the total energy

c)

the maximum velocity

d)

the maximum acceleration

20.
A force of  30 N stretches a very light ideal spring 0.73 m from equilibrium. What is the force constant (spring constant) of the spring?
a)
41 N/m
b)
22 N/m
c)
34 N/m
d)
46 N/m
21.
If the length of a simple pendulum is doubled, its period will: 
a)
halve 
b)
increase by a factor of sqrt(2) 
c)
decrease by a factor of sqrt(2)
d)
double 
22.
For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time?
a)
amplitude
b)
period
c)
frequency
d)
revolution
23.
What is the period on Earth of a pendulum with a length of 2.4 m?
a)
3.1 sec
b)
1.9 sec
c)
9.3 sec
d)
5.1 sec
24.

Based on your findings, which equation could best describe the pendulum’s period?

a)

A

b)

B

c)

C

d)

D

25.
The period of a pendulum may be decreased by
a)
Increasing the mass of the bob
b)
moving the equilibrium point
c)
decreasing the mass of the bob
d)
shortening the length of pendulum
26.

The maximum velocity occurs where the ____.


a)

potential energy is a maximum


b)

kinetic energy is a minimum


c)

displacement from equilibrium is equal to

the amplitude of 0.4 𝑚

d)

displacement from equilibrium is equal to

zero

27.

An object of mass 𝑚 is attached to a horizontal spring, stretched to a displacement 𝐴 from equilibrium and released, undergoing harmonic oscillations on a frictionless surface with period 𝑇 . The experiment is then repeated with a mass of 4𝑚. What’s the new period of oscillation?

a)

2T

b)

T

c)

4T

d)

T√2

28.

When is a pendulum in simple harmonic motion?

a)

Never

b)

All the time

c)

only at large angles

d)

only at small angles

29.

What is the definition of SHM?

a)

periodic motion without loss of energy in which the acceleration of a body is directly proportional to its displacement and is directed towards the equilibrium position but in opposite direction of the displacement.

b)

periodic motion without loss of energy in which the acceleration is directly proportional to its velocity and is directed towards the equilibrium position but in opposite direction of the velocity.

c)

periodic motion without loss of energy in which the acceleration of a body is inversely proportional to its displacement

d)

periodic motion without loss of energy in which the angular frequency is directly proportional to its displacement and is directed towards the equilibrium position but in opposite direction of the displacement.

30.

Position at which the body would come to rest if it were to lose all of its energy refers to

a)

equilibrium position

b)

maximum displacement / amplitude

c)

periodic position

d)

good position

31.
For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
a)
amplitude
b)
period
c)
frequency
d)
revolution
32.

The acceleration of a particle in SHM is:

a)

always zero

b)

always constant

c)

maximum at amplitude

d)

maximum at the equilibrium position

33.

The amplitude and period in a SHM is 0.5 m and 0.4 s respectively. The equation of SHM will be:

a)

x=0.5 sin 5πt

b)

x=0.5 sin 4πt

c)

x=0.5 sin 2.5πt

d)

x=0.5 sin 0.8πt

34.

Which of the following equation represent the displacement of SHM:

a)

x= A tan ωt

b)

x= A sin ωt

c)

x= A sin ωt cos kx

d)

x= A sin (ωt ± kx)

35.

What is the number of complete waves passing a fixed point in a given amount of time?

a)

Amplitude

b)

Intensity

c)

Wavelength

d)

Frequency

36.

What is frequency measured in?

a)

Milliseconds

b)

Miles

c)

Hertz

d)

Kilograms

37.

Period of a wave refers to...

a)

how long it takes for the event to repeat.

b)

how strong a wave is.

c)

how long a wave is.

d)

how much energy a wave has.

38.

Which type of waves have the longest wavelength?

a)

Visible light

b)

Radio waves

c)

X-rays

d)

Gamma-Rays

39.

The distance between repetitions in a wave is the ---.

a)

frequency

b)

wave speed

c)

amplitude

d)

wavelength

40.

What is the amplitude of the wave?

a)

3 m

b)

27 m

c)

8 m

d)

4 m

41.

What is the wavelength of the wave?

a)

3 m

b)

27 m

c)

35 m

d)

13 m

42.

What type of wave is this?

a)

Transverse

b)

Longitudinal

c)

Rayleigh

d)

electromagnetic

43.

What type of wave is this?

a)

Transverse

b)

Longitudinal

c)

Rayleigh

d)

electromagnetic

44.
What is represented by the letter 'x'?
a)
Crest
b)
Compression
c)
Rarefaction
d)
Wavelength
45.
What part is the arrow pointing to?
a)
Crest
b)
Trough
c)
Amplitude
d)
Wavelength
46.
The stationary dot is called:
a)
a node.
b)
an anti-node.
c)
the amplitude.
d)
the not moving bit.
47.

The diagram shows the standing wave pattern of a vibrating string which is fixed at ends X and Y.

Which one of these statements is true?

a)

P to R is one wavelength.

b)

At R the string will move up.

c)

The lowest frequency for this string is one third of its current value.

d)

Point Q represents a node

48.

A disturbance that transfers energy from one place to another without transferring matter:

a)

wave

b)

trough

c)

pitch

d)

period

49.
A wave that requires a medium through which to travel
a)
mechanical wave
b)
chemical wave
c)
electromagnetic wave
d)
pitch
50.
If a wave is traveling at 260 m/s and has a wavelength of 0.8 m/s, what is its frequency?
a)
208 Hz
b)
325 Hz
c)
430 Hz
d)
160 Hz
51.

Sound waves move faster in what temperature?

a)

higher temperature

b)

lower temperature

c)

it makes no difference

d)

both

52.
 A wave has frequency of 5 Hz and a speed of 25 m/s. What is the wavelength of the wave?
a)
25 m
b)
125 m
c)
5 m
d)
25 m/s
53.

The movement of a swing is known as ............

a)

transitional motion

b)

wave motion

c)

oscillatory motion

d)

(a) and (b)

54.

All of the following are examples of oscillatory motion except .....................

a)

motion of string

b)

motion of tuning fork

c)

motion of car

d)

motion of simple pendulum

55.

Which motion of the following represents a complete oscillation for the given simple pendulum?

a)

C ---> B ---> A ---> B

b)

A ---> B ---> C ---> B ---> A

c)

A ---> B ---> C ---> B

d)

B ---> C ---> B ---> A

56.

The maximum displacement made by oscillating body away from its rest position is ...................

a)

amplitude

b)

frequency

c)

periodic time

d)

complete oscillation

57.

The frequency is measured by a unit called .....................

a)

Hertz

b)

watt / m

c)

decibel

d)

m /sec

58.

If the frequency of an oscillating body is 6 HZ, the periodic time is .................... sec.

a)

13\frac{1}{3}

b)

3

c)

16\frac{1}{6}

d)

6

59.

The result of multiplying the frequency of an oscillating body by its periodic time equals .........................

a)


12\frac{1}{2}

b)

13\frac{1}{3}

c)

1

d)

14\frac{1}{4}

60.

.................... is (are) mechanical waves.

a)

water waves only

b)

sound waves only

c)

microwaves only

d)

both (b) and (c)

61.

Wave is the disturbance that propagates and transfers energy ....................

a)

in the direction of propagation.

b)

in the direction opposite to that of propagation.

c)

in the direction perpendicular to that of propagation.

d)

no correct answer

62.

Standing waves are created by

a)

Two identical waves reflecting off each other

b)

Two identical waves being diffracted together

c)

Two identical waves move through each other in opposite directions

d)

Two identical waves are diffracted from two identical sources

63.
The moving black dot is called:
a)
a node
b)
an anti-node
c)
an anti-amplitude
d)
the wangy bit
64.
The stationary dot is called:
a)
a node.
b)
an anti-node.
c)
the amplitude.
d)
the not moving bit.
65.

In the diagram which letters represent the nodes

a)

A B C

b)

A C E

c)

B D

d)

B D E

e)

A C D

66.
The diagram shows the standing wave pattern of a vibrating string which is fixed at ends X and Y.
Which one of these statements is true?
a)
P to R is one wavelength.
b)
At R the string will move up.
c)
The lowest frequency for this string is one third of its current value.
d)
The kinetic energy of the string is at its maximum value.
67.
A standing wave:
a)
transports energy but does not move.
b)
is composed of a single travelling wave.
c)
stores energy.
d)
makes a loud noise.
68.

Standing wave patterns produced in a medium are constrained to integer or half-integer multiples of resonant wavelengths. If a rope is fixed at both ends 1 m apart, which wavelength below could not possibly produce a standing wave?

a)

2 m

b)

1/3 m

c)

1/4 m

d)

3 m

69.

Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments

a)

True

b)

False

70.

A pipe, opened at both ends (40 cm long) makes a tone travelling at 330 m/s. Calculate the frequency of the fundamental wave.

a)

4.125 Hz

b)

264 Hz

c)

26400 Hz

d)

412.5 Hz

71.

Even numbered harmonics (multiples of fundamental frequency) do not form in a closed pipe because

a)

the pipe “fits” only an odd number of quarter wavelengths

b)

the pipe “fits” only an even number of quarter wavelengths

c)

the pipe cannot put an anti-node at the open end

d)

the pipe cannot get enough air to vibrate in the pipe at these lengths

72.

The pipe length of A is 0.18 m. Sound travels at 343 ms-1 Calculate the frequency of the sound produced.

a)

686 Hz

b)

1905.56 Hz

c)

343 Hz

d)

1429.17 Hz

73.

The pipe length of B is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

74.

The pipe length of C is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

75.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

76.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

77.

The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 4th harmonic?

a)

A

b)

B

c)

C

d)

D

e)

E

78.

The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 3rd harmonic?

a)

A

b)

B

c)

C

d)

D

e)

E

79.

The figure shows several modes of vibration of a string fixed at both ends. The mode of vibration that represents the fifth harmonic is

a)

1

b)

2

c)

3

d)

4

e)

None of these is correct.

80.

The figure shows a standing wave in a pipe that is closed at one end. The frequency associated with this wave pattern is called the

a)

first harmonic.

b)

second harmonic.

c)

third harmonic.

d)

fourth harmonic.

e)

fifth harmonic.

81.

The air in a closed organ pipe vibrates as shown. The length of the pipe is 3.0 m. The frequency of vibration is 80 Hz. The speed of sound in the pipe is approximately

a)

80 m/s

b)

0.16 km/s

c)

0.24 km/s

d)

0.32 km/s

e)

0.96 km/s

82.

Standing waves are created by

a)

Two identical waves reflecting off each other

b)

Two identical waves being diffracted together

c)

Two identical waves move through each other in opposite directions

d)

Two identical waves are diffracted from two identical sources

83.

Do standing waves carry energy from one area to another?

a)

Yes

b)

No

84.

Which statement is correct about the half wave A B C

a)

All particles in this half wave are in phase with each other as they all move in the same direction

b)

The particles A B C are in phase with the next half wave C D E because they all move in the same direction

c)

All particles in this part of the wave are out of phase with each other as they all move in different directions

d)

All particles in A B C have carried energy from one area to another

85.

Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments

a)

True

b)

False

86.

Even numbered harmonics do not form in a closed pipe because

a)

the pipe “fits” only an odd number of quarter wavelengths

b)

the pipe “fits” only an even number of quarter wavelengths

c)

the pipe cannot put an anti-node at the open end

d)

the pipe cannot get enough air to vibrate in the pipe at these lengths

87.

What number harmonic is shown in C

a)

1

b)

2

c)

3

d)

4

88.

What number harmonic is shown in A

a)

1

b)

2

c)

3

d)

4

89.

What number harmonic is shown in D

a)

1

b)

2

c)

3

d)

4

90.

What number harmonic is shown in B

a)

1

b)

2

c)

3

d)

4

91.

If a sound wavelength gets smaller what do you hear?

a)

A louder sound

b)

A quieter sound

c)

A higher pitch sound

d)

A lower pitch sound

92.

If a sound Amplitude gets smaller what do you hear?

a)

A louder sound

b)

A quieter sound

c)

A higher pitch sound

d)

A lower pitch sound

93.

A wave with a wavelength of 5m is traveling with a velocity of 2.5 m/s. Calculate its frequency.

a)

12.5 Hz

b)

0.5 Hz

c)

2 Hz

d)

15 Hz

94.

In the diagram which letters represent where a sound wave will be at its loudest?

a)

A B C

b)

A C 3

c)

B D

d)

B D E

e)

A C D

95.

If you walk along the line of the standing wave what will you hear?

a)

The sound loudness stays the same from A to E

b)

The pitch of the sound changes as you move from A to B to C

c)

The loudness of the wave changes from no sound / quietest at B to loudest at C

d)

The loudness of the wave changes from no sound / quietest at C to loudest at D

96.

The pipe length of C is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

97.

The pipe length of B is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

98.

The pipe length of A is 0.18 m. Sound travels at 343 ms-1 Calculate the frequency of the sound produced.

a)

686 Hz

b)

1905.56 Hz

c)

343 Hz

d)

1429.17 Hz

99.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

100.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

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