• #### 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

• 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

• √3 : 2
• 2 : √3
• 3 : √2
• √2 : 3

• 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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