Wave Motion

The ratio of fundamental frequency of an open end pipe to that of a closed end pipe is.

• 2 : 1

• 1 : 2

• 3 : 2
  

• 1 : 1

In a ripple 100 waves pass across a certain point in 1 sec. If  $\lambda=4m$  the speed of wave is

• 100 m/s

• 25 m/s 

• 400 m/s
  

• 0 m/s 

The wavelength of the fundamental mode of vibration of a closed pipe of length  $\iota$ is 

•  $\iota$ /2

•  $\iota$  
  

• 2 $\iota$  

• 4 $\iota$  

The frequency of waves in a string is 200 Hz. If tension is increased 4 time its frequency will be

• 800 Hz 
  

• 1600 Hz 
  

•  400 Hz 

• 200 Hz        

The fundamental frequency of a closed organ pipe is 50 Hz. The frequency of the second overtone is

• 100 Hz 
  

• 150 Hz 
  

• 200 Hz 

• 250 Hz        

Stationary waves of frequency 300 Hz are formed in a medium in which the velocity of sound is 1200 m/s. The distance between a node and the neighboring anti-node is 

• 1 m
  

• 2 m
  

• 3 m

• 4 m

All the laws of transverse vibration of string can be verified using sonometer, which of the following law is incorrect

•  $fa\ \frac{1}{L}$  
  

•  $Fa\ \sqrt{T}$  
  

•  $Fa\ \frac{1}{\sqrt{\mu}}$  
  

•  $Fa\ \frac{1}{T}$  
  

They types of wave produced in a sonometer wire are

• Transverse progressive
  

• Transverse stationary 
  

• Longitudinal Progressive
  

• Longitudinal stationary
  

The movement (velocity) of particles at the anti-nodes in a stationary wave is 

• Maximum
  

• Minimum 
  

• Zero
  

• None of these
  

Under a given tension T, a string of length  vibrates in one segment. To make it vibrate in two segments with the same frequency, the tension should be

• T/2
  

• T/4

• 2T

• 4T