Tag: sound as a wave of disturbance

Quizzes (0) Questions (122)

Questions Related to sound as a wave of disturbance

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

All waves can be classified into two categories which are

  1. Sound waves and electromagnetic waves

  2. Transverse waves and electromagnetic waves

  3. Longitudinal waves and electromagnetic waves

  4. Transverse waves and longitudinal waves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All waves can be classified into two categories . They are Transverse and longitudinal waves

A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves.
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves
Therefore option $D$ is correct

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Transverse nature of light was confirmed by the phenomenon of the

  1. refraction of light

  2. diffraction of light

  3. dispersion of light

  4. polarization of light.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The phenomenon of polarization confirms that light is a transverse wave because for polarization, the light should have different components oscillating in the different planes and a transverse wave has the oscillations perpendicular to the direction of propagation of the wave.

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Chronometer is?

  1. An clock for determining the longitude of a vessel at sea

  2. An instrument for changing or reversing the direction of electric current

  3. An instrument for measuring the direction and velocity of wind

  4. An instrument for comparing intensities of colours
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chronometer is an instrument for measuring time accurately in spite of motion or variations in temperature, humidity, and air pressure.So it can be used a a clock for determining the longitude of a vessel at sea.

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Which of the following statements is true?

  1. Pressure undergoes no change at the nodes in the case of longitudinal stationary waves

  2. Pressure is minimum at the nodes in the case of longitudinal stationary waves

  3. Pressure is maximum at nodes in the case of longitudinal stationary waves

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

At nodes in longitudinal waves,there is maximum compression, So, there will be pressure.

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

When source and detector are stationary but the wind is blowing at speed ${ v } _{ w }$, the apparent wavelength ${ \lambda  }'$ on the wind side is related to actual wavelength ${ \lambda  }$ by [take speed of sound in air as v]

  1. ${ \lambda }'={ \lambda }$
  2. ${ \lambda }'=\frac { { v } _{ w } }{ v } \lambda $
  3. ${ \lambda }'=\frac { { v } _{ w }+v }{ v } \lambda $
  4. ${ \lambda }'=\frac { v }{ v-{ v } _{ w } } \lambda $
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The apparent speed of sound with wind is (v + vw). The frequency f remains constant. Since v_apparent = f * lambda_prime, we have (v + vw) = f * lambda_prime. Since v = f * lambda, f = v/lambda. Thus, lambda_prime = (v + vw) / (v/lambda) = ((v + vw) / v) * lambda.

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Assertion - Sound wave is an example of longitudinal wave.
Reason - In longitudinal waves, the constituents of the medium oscillate perpendicular to the direction of wave propagation.

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

  3. Assertion is correct but Reason is incorrect

  4. Both Assertion and Reason are incorrect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A sound wave is an example of the longitudinal wave.
But in longitudinal waves, the constituents of the medium oscillate parallel to the direction of wave propagation. So sound wave is an example of longitudinal wave.