Tag: sound

Questions Related to sound

The type of waves that can be propagated in solids are :

physics sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. Longitudinal

  2. Transverse

  3. both

  4. None

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Correct Option: C
Explanation:

Mechanical waves (longitudinal waves and transverse waves) are waves which propagate through a material medium (solid, liquid or gas) at a wave speed which depends on the elastic and inertial properties of that medium. 
The transverse waves depends on the rigidity of the medium hence, can propagate through solid and liquid medium but not through gases.
The longitudinal waves depends on resistance to compression or volume elasticity of the medium hence, can propagate through solid, liquid and gases.

A rope length $\displaystyle l$ and mass $\displaystyle m$ hanges freely from the ceiling. The velocity of transverse wave as a function of position $\displaystyle x$ along the rope is proportional to

physics sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. 1 / $\displaystyle \sqrt x$

  2. $\displaystyle \sqrt x$

  3. $\displaystyle x$

  4. $\displaystyle x^0$

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Correct Option: B
Explanation:

$\text{Mass per unit length of rope} =\dfrac{m}{l}$
Mass of rope of length $x =\dfrac { m }{ l } x$
Tension, $T = \dfrac { m }{ l } xg$
Velocity, $v=\sqrt { \dfrac { T }{ m }  } =\sqrt { \dfrac { mgl }{ lm } x }$      which is directly proportional to $\sqrt { x } $

When slinky is stretched out in a horizontal direction and first coils are vibrated horizontally then which waves are generated?

physics sound sound as a wave of disturbance vibrations in a tuning fork vibrations in tuning fork

  1. Longitudinal Waves

  2. Transverse Waves

  3. Surface waves 

  4. None

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Correct Option: A
Explanation:

Longitudinal Waves are generated when slinky is stretched out in a horizontal direction and first coils are vibrated horizontally 

Light waves are transverse in nature.

physics sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. True

  2. False

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Correct Option: A
Explanation:

light is a EM wave and has transverse nature .

so the answer is A.

A longitudinal wave is a wave that consists of oscillations that are 

physics sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. perpendicular to the direction of wave propagation

  2. parallel to the direction of wave propagation

  3. radial to the direction of wave propagation

  4. none of the above

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Correct Option: B
Explanation:

A longitudinal wave is a wave that consists of oscillations that are perpendicular to the direction of wave propagation

The correct option is (b)

In a longitudinal wave, the density of particles is more at a compression.

physics sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

  1. True

  2. False

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Correct Option: A
Explanation:

in longitudinal waves at compressions density is high and at rerefactions the particle density is low.

so the answer is A.