Waves

The transverse waves can propagate through

• gases but not thorough metals
• metals but not through gases
• both gases and metals
• neither gases nor metals

A 5.5 m length of string has a mass of 0.035 kg. If the tension in the string is 77 N, the speed of a wave on the string is

• 110 m s-1
• 165 m s-1
• 77 m s-1
• 102 m s-1

The distance between a node and the nearest antinode in a stationary wave is:

• λ/2

• λ/4

• λ

• 2λ

The distance between two successive nodes in a stationary wave is:

• λ/4

• λ/2

• λ

• λ/3

If the tension in a stretched string is increased four times, how will the wave velocity change?

• It remains unchanged
  

• It becomes half
  

• It doubles
  

• It quadruples

Which of the following statements about stationary waves is incorrect?

• They do not transfer energy
  

• There are nodes and antinodes
  
  

• The amplitude is the same everywhere

• Formed due to interference of two identical waves moving in opposite directions

A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is the speed of sound in the medium?

• 340 m/s
  

• 220 m/s
  

• 400 m/s
  

• 500 m/s

The equation of a progressive wave traveling in the positive x-direction is given by:

y=Asin(kx+ωt)

What would be the direction of wave propagation ?

• Positive x-direction
  

• Negative x-direction
  

• Positive y-direction

• Negative y-direction

speed of sound in gases does not depend on

• pressure

• density

• temperature

• humidity

The formula for wave speed is

• v=fλ

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