Free Test Sound waves – NEET

Q1: Which of the following is a longitudinal wave?

A. Light B. Sound C. Radio waves D. X-rays

Q2: What is the speed of sound in dry air at 20°C?

A. 331 m/s B. 343 m/s C. 300 m/s D. 360 m/s

Q3: Sound cannot travel through which of the following?

A. Solid B. Liquid C. Gas D. Vacuum

Q4: Which of the following quantities remains constant in all media?

A. Speed B. Wavelength C. Frequency D. Amplitude

Q5: Which wave characteristic determines pitch?

A. Amplitude B. Wavelength C. Frequency D. Speed

Q6: The unit of sound intensity is:

A. Watt B. dB C. Watt/m² D. Pascal

Q7: What is the wavelength of a 343 Hz sound in air at 20°C?

A. 1 m B. 2 m C. 0.5 m D. 343 m

Q8: Which of the following increases when sound gets louder?

A. Frequency B. Wavelength C. Speed D. Amplitude

Q9: Infrasonic sounds have frequency:

A. Below 20 Hz B. 20-20,000 Hz C. Above 20,000 Hz D. None

Q10: Ultrasonic waves are used in:

A. Radio communication B. Ultrasound imaging C. Television D. Electric bells

Q11: The echo is heard when the minimum distance of the reflecting surface is at least:

A. 1 m B. 5 m C. 17 m D. 34 m

Q12: The loudness of sound is measured in:

A. Watt B. dB C. Hz D. Newton

Q13: Which property of sound changes with temperature?

A. Frequency B. Speed C. Amplitude D. Phase

Q14: Beats are formed due to interference of two waves having:

A. Different amplitudes B. Same frequency C. Different frequencies D. Different speeds

Q15: If a tuning fork produces 2 beats per second with another, their frequencies differ by:

A. 0 B. 1 C. 2 D. 3

Q16: In an open organ pipe, the fundamental frequency is:

A. v/2L B. v/L C. v/4L D. 2v/L

Q17: In a closed organ pipe, the fundamental frequency is: