Oscillations and Waves (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 188  192 of 195
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Question number: 188
» Oscillations and Waves » Doppler Effect in Sound
Question
An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is
Choices
Choice (4)  Response  

a.  90 Hz 

b.  91 Hz 

c.  100 Hz 

d.  110 Hz 

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Question number: 189
» Oscillations and Waves » Doppler Effect in Sound
Question
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
Choices
Choice (4)  Response  

a.  409 

b.  517 

c.  429 

d.  500 

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Question number: 190
» Oscillations and Waves » Harmonics
Question
A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21 A between them. The wavelength of the standing wave is
Choices
Choice (4)  Response  

a.  6.05 Å 

b.  1.21 Å 

c.  2.42 Å 

d.  3.63 Å 

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Question number: 191
» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring
Appeared in Year: 2016
Question
A body of mass is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass is slightly pilled down and released, it oscillates with a time period of . When the mass is increased by 1 kg, the time period of oscillation becomes . The value of in is:
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 192
» Oscillations and Waves » Standing Waves in Strings and Organ Pipes
Appeared in Year: 2016
Question
The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe L meter long. The length of the open pipe will be –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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