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Sound Worksheet-3

Sound Worksheet-3

 

  1. Birds produce sound by using:

(a) vocal chord                              (b) Larynx

(c) Glottis                                       (d) Syrix

 

  1. A source is producing 15 oscillations (waves) in 3 seconds. Find its freque­ncy?

(a) 15 Hz            (b) 5Hz               (c) 0.2 Hz          (d) 0.66 Hz

 

  1. Which of the following is NOT correct?

(a) more oscillation per second, higher time period

(b) greater amplitude greater loudness

(c) higher pitch, higher frequency of vibration

(d) more the value of decibel, higher is the noise

 

  1. The difference between a musical sound and noise is:

(a) Amplitude   (b) Loudness     (c) Vibration     (d) all of these

 

  1. Which of the following sound is NOT a cause of noise pollution?

(a) loud speaker                            (b) horn of vehicle

(c) Explosion                                 (d) Television

 

  1. Noise pollution can cause:

(a) Insomnia                                  (b) Hypertension

(c) hearing impairment              (d) any or all of these

 

  1. The buzzing sound produced by a mosquito is produced by:

(a) its mouth                                  (b) vibration of surrounding air

(c) vibration of wings                  (d) none of these

 

  1. Which of the following statement is TRUE?

(a) human ear drum senses the vibration of sound

(b) larger the amplitude of vibration, louder is the sound

(c) higher is the frequency of vibration, lower is the pitch

(d) plantations can reduce noise pollution

 

  1. The membrane of a drum vibrates to produce sound. Similarly the string of a sitar vibrates to produce sound. Based on these two examples answer the following question. Which part of a whistle vibrates to produce sound?

(a) body of whistle                       (b) Air

(c) mouth of the person              (d) all of these

 

  1. When a tuning fork was struck and brought near a bucket of water, a wave as shown in figure was formed on its surface. It the fork is struck much harder and brought near the surface, what will increase?

(a) Frequency                                (b) Wavelength

(c) Velocity                                     (d) Amplitude

 

Answer Key:

(1)-(d); (2)-(b); (3)-(a); (4)-(c); (5)-(d); (6)-(d); (7)-(c); (8)-(c); (9)-(b); (10)-(d)