Welcome to your Sound 1. _________ is a measure of the response of the ear to the sound. (a) Intensity (b) Loudness (c) Wavelength (d) Amplitude None 2. The amount of sound energy passing each second through unit area is called the ________ of sound. (a) Intensity (b) Loudness (c) Wavelength (d) Amplitude None 3. The sound which is produced due to a mixture of several frequencies is called a __________ (a) tone (b) music (c) note (d) noise None 4. The __________ of sound is that characteristic which enables us to distinguish one sound from another having the same pitch and loudness. (a) amplitude (b) quality or timbre (c) wavelength (d) time period None 5. The loudness or softness of a sound is determined by its __________ (a) time period (b) wavelength (c) frequency (d) amplitude None 6. If a simple pendulum oscillates 10 times in 10 seconds, then its frequency is ________. (a) 100 Hz (b) 10 Hz (c) 1 Hz (d) 0.1 Hz None 7. The frequency of a tuning fork that produces waves of time period of 2 seconds during its free vibration is __________ (a) 0.05 Hz (b) 0.5 Hz (c) 5 Hz (d) 50 Hz None 8. The distance between two consecutive compressions (C) or two consecutive rarafactions (R) is called the ____________ (a) Frequency (b) Time period (c) Wavelength (d) Amplitude None 9. The velocity of sound in air ___________ with the rise in temperature. (a) increases (b) decreases (c) remains unchanged (d) increases and then decreases None 10. The image below shows two sound waves A and B of the same frequency. Identify the correct statement for the given image. (a) The amplitude of wave A is greater than that of wave B. (b) The amplitude of wave A is lesser than that of wave B. (c) The amplitude of wave A is equal than that of wave B. (d) The amplitude of wave A is greater than or equal to that of wave B. None 11. Sound travels in air if (a) particles of medium travel from one place to another (b) there is no moisture in the atmosphere (c) disturbance moves (d) both particles as well as disturbance travel from one place to another. None 12. When we change loud sound to feeble sound we ___________. (a) increase its frequency (b) reduce its frequency (c) increase its amplitude (d) reduce its amplitude. None 13. The image below shows a sound wave. Which of the following distance correctly represents the wavelength of the wave? (a) AB (b) AC (c) BD (d) BF None 14. In SONAR we use (a) ultrasonic waves (b) infrasonic waves (c) radio waves (d) audible sound waves. None 15. Loud sound can travel a larger distance, due to (a) lower amplitude (b) higher energy (c) high frequency (d) high speed None 16. Assertion (A); Sound waves are mechanical in nature. Reason (R): Sound waves require a material medium for propagation. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true None 17. Assertion (A): Sound waves are longitudinal waves. Reason (R): In sound waves, the particles of the medium oscillate perpendicular to the direction of propagation of the wave. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true None 18. Assertion (A): The pitch of the sound is determined by the amplitude of sound wave. Reason (R): The pitch is the characteristic of sound by which we can distinguish between different sounds of the same loudness. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true None 19. Assertion (A): The loudness or softness of sound is determined by the amplitude. Reason (R): The amplitude of the sound wave is independent of the force with which an object is made to vibrate. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true None 20. Assertion (A): the sensation of sound persists in our brand for about 0.1 s Reason (R): To hear a distant echo (in air at room temperature), the minimum distance of obstacle from the source of sound must be 17.2 m. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true None 1 out of 1 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Name * Email * Website Comment * Save my name, email, and website in this browser for the next time I comment.