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DSSSB TGT Sound Waves — practice questions

Explore 29 free Sound Waves questions in DSSSB TGT Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Sound Waves questions and exercises with answers

Showing questions 1–29 of 29.

Sound is produced by:Read the answer and worked solution →Sound waves are an example of:Read the answer and worked solution →Sound CANNOT travel through:Read the answer and worked solution →In a sound wave, a region where the density of the medium is HIGHER than average is called a:Read the answer and worked solution →The human audible frequency range is approximately:Read the answer and worked solution →In which medium does sound travel FASTEST?Read the answer and worked solution →The wavelength λ, frequency ν, and speed v of a wave are related by:Read the answer and worked solution →An object oscillates 200 times in 5 seconds. Its frequency is:Read the answer and worked solution →Which characteristic of a sound wave determines its LOUDNESS?Read the answer and worked solution →A tuning fork produces a sound of frequency 256 Hz. If the speed of sound in air is 340 m/s, the wavelength of the sound in air is approximately:Read the answer and worked solution →Calculate the time period of a sound of frequency 50 Hz:Read the answer and worked solution →The minimum distance from a reflecting surface needed to hear a CLEAR echo (with speed of sound ≈ 340 m/s) is about:Read the answer and worked solution →A sonar pulse sent from a ship hits a submarine and returns after 0.90 s. Speed of sound in seawater is 1530 m/s. The distance to the submarine is:Read the answer and worked solution →An ultrasonic wave has a frequency of 50 kHz. If the speed of sound in air is 340 m/s, its wavelength is approximately:Read the answer and worked solution →In a longitudinal wave, particles vibrate:Read the answer and worked solution →A tuning fork produces sound by:Read the answer and worked solution →A region of HIGH air density in a sound wave is called a:Read the answer and worked solution →What does ν (the Greek letter nu) typically denote for a wave?Read the answer and worked solution →Speed of sound in air is roughly:Read the answer and worked solution →How is sound INTENSITY related to the SQUARE of the AMPLITUDE?Read the answer and worked solution →Which of the following CANNOT carry sound?Read the answer and worked solution →An echo is a:Read the answer and worked solution →A whistle has a frequency of 1700 Hz. If the speed of sound in air is 340 m/s, the wavelength is:Read the answer and worked solution →A bat emits an ultrasonic pulse at 60 kHz. After 0.04 s, it hears the echo. How far is the obstacle? (Speed of sound = 340 m/s)Read the answer and worked solution →What is the TIME PERIOD of a sound wave with frequency 100 Hz?Read the answer and worked solution →Sound travels through a steel rail at 5000 m/s. A train signal sent through the rail reaches a distance of 1 km in:Read the answer and worked solution →A sound wave's loudness is perceived from its:Read the answer and worked solution →Sound levels above 80 dB sustained for long periods can:Read the answer and worked solution →The frequency of human hearing typically decreases with age. The MOST AFFECTED frequencies are:Read the answer and worked solution →

Worked practice questions

Sound is produced by:

  1. Stationary objects
  2. Heated objects only
  3. Vibrating objects
  4. Magnetic objects
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Correct answer: C. Vibrating objects

Sound is produced by vibrations of an object — a struck bell, plucked rubber band, vibrating air column in a flute, or the vocal cords in our throat. When the vibration stops, the sound stops.

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Sound waves are an example of:

  1. Longitudinal waves
  2. Electromagnetic waves
  3. Transverse waves
  4. Stationary waves
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Correct answer: A. Longitudinal waves

In sound waves, particles of the medium vibrate PARALLEL to the direction of wave propagation — this is the defining feature of a longitudinal wave. Transverse waves (like light, water surface waves) have particles vibrating perpendicular to the wave direction.

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Sound CANNOT travel through:

  1. Water
  2. Air
  3. Vacuum
  4. Steel
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Correct answer: C. Vacuum

Sound is a vibration of particles of a medium. A vacuum has no particles to vibrate, so sound cannot propagate through it. Astronauts on a spacewalk cannot hear each other through the vacuum of space — they communicate via radio (electromagnetic waves, which need no medium).

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