Waves Test

Result

Waves Test - 87

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Weekly Quiz Competition

Question 1
4 / -1

Apparatus used to find out the velocity of sound in gas is

A
Melde's apparatus

B
Kundt's tube

C
Quincke's tube

D
None of these
Question 2
4 / -1

Standing stationary waves can be obtained in an air column even if the interfering waves are

A
Of different pitches

B
Of different amplitudes

C
Of different qualities

D
Moving with different velocities
Question 3
4 / -1

The stationary wave y = 2a sin kx cos wt in a closed organ pipe is the result of the superposition of y y = a sin (ω t – kx) and

A
y = – a cos (ω t + kx)

B
y = – a sin (ω t + kx)

C
y = a sin (ω t + kx)

D
y = a cos (ω t + kx)

Solution
Question 4
4 / -1

Stationary waves are set up in air column. Velocity of sound in air is 330 m/s and frequency is 165 Hz. Then distance between the nodes is

A
2 m

B
1 m

C
0.5 m

D
4 m

Solution
Question 5
4 / -1

An open pipe of length 1 vibrates in fundamental mode. The pressure variation is maximum at

A
1/4 from ends

B
The middle of pipe

C
The ends of pipe

D
At 1/8 from ends of pipe
Question 6
4 / -1

Fundamental frequency of pipe is 100 Hz and other two frequencies are 300 Hz and 500 Hz then

A
Pipe is open at both the ends

B
Pipe is closed at both the ends

C
One end open and another end is closed

D
None of the above

Solution
Question 7
4 / -1

On producing the waves of frequency 1000 Hz in a Kundt\'s tube, the total distance between 6 successive nodes is 85 cm. Speed of sound in the gas filled in the tube is

A
330 m/s

B
340 m/s

C
350 m/s

D
300 m/s

Solution
Question 8
4 / -1

What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends?

A
17, closed

B
85, closed

C
17, open

D
85, open

Solution
Question 9
4 / -1

A student determines the velocity of sound with the help of a closed organ pipe. If the observed length for fundamental frequency is 24.7 m, the length for third harmonic will be

A
74.1 cm

B
72.7 cm

C
75.4 cm

D
73.1 cm

Solution
Question 10
4 / -1

An open pipe of length 33 cm resonates with frequency of 100 Hz. If the speed of sound is 330 m/s, then this frequency is

A
Fundamental frequency of the pipe

B
Third harmonic of the pipe

C
Second harmonic of the pipe

D
Fourth harmonic of the pipe

Solution