MDCAT Physics Chapter 6 MCQ Test With Answer for (Waves )

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MCQ's Test For MDCAT Physics Chapter 6 Waves Online Test

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MDCAT Physics Chapter 6 Waves Online Test

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Question # 1

When an observer moves towards a stationary source with a speed equal to 1/5 timesof speed of sound, the percentage increase in the frequency of sound is:

Question # 2

If source and observer are moving towards each other with same speed and aftercrossing they are receding each other then frequency observed by observer:

Question # 3

A progressive sound wave is a means of transferring energy. A progressive sound waveof constant frequency is generated in air. The intensity of energy transfer is directlyproportional to another of the wave parameters. Which of the following is correct?

Question # 4

A stationary wave is established in a string which vibrates in four segments at afrequency of 120 Hz. Its fundamental frequency is:

Question # 5

If a transverse wave has a speed of 10 m/ sec and frequency of 10 cycle/ sec itswavelength is:

Question # 6

The frequency of an open pipe is f. if one end is closed then its fundamental frequencywill be:

Question # 7

The maximum wavelength of a transverse wave that can be set up in a string of length Lis

Question # 8

In closed end organ pipe, the frequency of first harmonic is 300 Hz. The frequency ofthird overtone is :

Question # 9

A particular wavelength received from a galaxy is measured on earth and isfound to be 5% more than that its wave length on earth. Hence galaxy is

Question # 10

The wavelength of light observed on the earth, form a moving star is found todecrease by 0.05%. Relative to the earth the star is

Question # 11

A sonar depth finder in a boat uses sound signals to determine the depth of water. Fourseconds after the sound leaves the boat it returns to the boat because of reflection fromthe bottom. Assume the speed of sound in water is 1,460 meters per second. The depth of the water is, in meters, :

Question # 12

A closed organ pipe and an open organ pipe have their first overtones of identicalfrequency. Their respective lengths are in the ratio:

Question # 13

Which one is the case when the wavelength is actually changed?

Question # 14

The spectrum of a star’s light is measured and the wavelength of one of the lines as thesodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm whenobserved in the laboratory. This means the star is

Question # 15

It is a common characteristic of all types of wave motion that

Question # 16

A string vibrates in 1 loop has frequency 25 Hz if it moves in 2 loops its frequencywould be:

Question # 17

An organ pipe open at both ends and another organ pipe, closed at one end willresonate with each other, if their lengths are in ration of

Question # 18

The fundamental frequency of a closed organ pope is 50 Hz. The frequency ofsecond over tone is

Question # 19

Where in standing wave, do the vibrations of the medium occur?

Question # 20

A church organ consist of open ended pipes ranging from 4m to 4 mm, if the speed ofsound is considered as 400 m/s then the min and max frequency is:

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Sr.# Question Answer
1 In closed end organ pipe, the frequency of first harmonic is 300 Hz. The frequency ofthird overtone is :
A. 900 Hz
B. 1500 Hz
C. 2100 Hz
D. 600 Hz
2 Bats navigate and find food by:
A. Ultrasonic
B. Echolocation
C. Refraction
3 Wavelength of the wave is the distance between the particles of the medium having adifference of:
A. Zero
B. n
C. 2n
D. 𝜋2
4 The wavelength of light observed on the earth, form a moving star is found todecrease by 0.05%. Relative to the earth the star is
A. moving away with a velocity of 1.5 x 105m/s
B. moving away with a velocity of 1.5 x 104m/s
C. coming closer with a velocity of 1.5 x 105m/s
D.
coming closer with a velocity of 1.5 x 104m/s
5 A whistle is revolved with high speed in a horizontal circle of radius R. to an observer at the centre of the circle the frequency of the whistle will appear to be:
A. Decreasing
B. Increasing
C. Both
D. Constant
6 A church organ consist of open ended pipes ranging from 4m to 4 mm, if the speed ofsound is considered as 400 m/s then the min and max frequency is:
A. 400 Hz and 4 kHz
B. 100 Hz and 100 kHz
C. 50 Hz and 50kHz
D. 400 Hz and 400 kHz
7 The maximum wavelength of a transverse wave that can be set up in a string of length Lis
A. L
B. 2L
C. V
D. 4L
8 If source and observer are moving towards each other with same speed and aftercrossing they are receding each other then frequency observed by observer:
A. Decreases
B. Remains constant
C. Increases
D. First Increases then decreases
9 If a transverse wave has a speed of 10 m/ sec and frequency of 10 cycle/ sec itswavelength is:
A. 1 m
B. 10-2 cm
C. 10 m
D. 10 cm
10 The frequency of the fundamental mode of open at one organ pipe is 400 Hz. Ifone end of pipe is closed the fundamental frequency will be
A. 800 Hz
B. 600 Hz
C. 400 Hz
D. 200 Hz
11
When passes from medium to another, deviate from its path is called
A. reflection
B.
refraction
C. diffraction
D. transmission
12 The fundamental frequency of a closed organ pope is 50 Hz. The frequency ofsecond over tone is
A. 100hz
B. 150hz
C. 60hz
D. 250hz
13 It is a common characteristic of all types of wave motion that
A. Particles move up and down
B. Particles move back and forth
C. Energy is transferred without the transport of particles
D. A material medium transmits the disturbance
14 A sonometer wire 100 cm in length has a fundamental frequency of 330 Hz. Thevelocity of propagation of waves along the wire is
A. 115m/sec
B. 115m/sec
C. 660m/sec
D. 990m/sec
15 Where in standing wave, do the vibrations of the medium occur?
A. Only at the nodes
B. Only at the antinodes
C. At all points between the nodes
D. At all points between the antinodes
16
The frequency of an open pipe is f. if one end is closed then its fundamental frequencywill be:
A. f/2
B. 3f/4
C. f
D. 2f
17 An organ pipe open at both ends and another organ pipe, closed at one end willresonate with each other, if their lengths are in ration of
A. 1:1
B. 1:4
C. 2:1
D. 1:2

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