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MCQ Questions for CBSE Class 12 with Answers
MCQ Questions for CBSE Class 11 with Answers
MCQ Questions for CBSE Class 10 with Answers
MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
MCQ Questions for CBSE Class 7 with Answers
MCQ Questions for CBSE Class 6 with Answers
MCQ Questions for CBSE Class 5 with Answers
MCQ Questions for CBSE Class 4 with Answers
MCQ Questions for CBSE Class 3 with Answers
MCQ Questions for CBSE Class 2 with Answers
MCQ Questions for CBSE Class 1 with Answers
Quiz
CBSE
/
Class 11
/
Physics
/
Waves
1.
Four wires of identical lengths, diameters and material and stretched on a sonometer box. The ratio of their tension is 1 : 4 : 9 : 16. the ratio of their fundamental frequencies is
1 : 6 : 9 : 16
4 : 3 : 2 : 1
1 : 2 : 3 : 4
1 : 4 : 9 : 16
2.
The equation of wave traveling along string is y = 3 cos p (100t - x) in C.G.S. unit then wavelength is
1 m
2 cm
5 cm
None of above
3.
A resonating column of air contains
Stationary longitudinal waves
Stationary transverse waves
Transverse progressive waves
Longitudinal progressive waves
4.
A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is
409
429
517
500
5.
When a compression is incident on rigid wall it is reflected as
Compression with a phase change of p
Compression with no phase change
Rarefaction with a phase change of p
Rarefaction with no phase change
6.
To demonstrate the phenomenon of beats we need
Two sources which emit radiation of nearly the same frequency
Two sources which emit radiation of exactly the same frequency
Two sources which emit radiation of exactly the same frequency and have a definite phase relationship
Two sources which emit radiation of exactly the same wavelength
7.
Transverse are generated in two uniform wires A and B by attaching their free ends to a vibrating source of frequency 600 Hz. The diameter of wire A is one-third that of wire B and tension in the wire A is double that in wire B. What is the ratio of velocities of waves of waves in wire A and B?
√3 : 2
2 : √3
3 : √2
√2 : 3
8.
The extension in a string, obeying Hookes law is X. The speed of sound in the stretched string is V. If the extension in the string is increased to 1.5 X, the speed of sound will be
1.22 V
0.61 V
1.50 V
0.75 V
9.
String is in fundamental mode of vibration then velocity is directly proportional to _______
Square root of tension
Square root of length
Square of tension
Square root of linear density
10.
With the increase in temperature, the frequency of the sound from an organ pipe
Decreases
Increases
Remain unchanged
Changes erratically
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