Sound Waves — Prelims Questions

Consider the following statements regarding sound waves: 1. Sound waves are electromagnetic waves. 2. Sound travels faster in vacuum than in air. 3. The pitch of a sound is determined by its frequency. 4. Ultrasound is used in medical imaging due to its high frequency and ability to penetrate soft tissues. Which of the statements given above are correct?

Arrange the following media in increasing order of the speed of sound: 1. Water 2. Air 3. Steel Select the correct order using the code given below:

Which of the following phenomena is responsible for the apparent change in the pitch of a siren as an ambulance approaches and then moves away from an observer?

Consider the following statements regarding the applications of sound waves: 1. Sonar technology uses ultrasonic waves to measure ocean depth and detect underwater objects. 2. Medical ultrasound imaging utilizes low-frequency sound waves to visualize internal body structures. 3. Noise cancellation headphones work on the principle of constructive interference of sound waves. Which of the statements given above is/are correct?

Which of the following factors does NOT affect the speed of sound in a gaseous medium?