Class VIII

In dholak sound is produced due to ...
  1. stretched membrane
  2. stretched strings
  3. air column
  4. vibration of air
To an fro motion of an object is called
  1. Waves
  2. Amplitude
  3. Vibration
  4. all of the above
The voice box is called:
  1. Stomach
  2. Heart
  3. Larynx
  4. Mouth
The sound above ___ is physically painful
  1. 20 dB
  2. 40 dB
  3. 60 dB
  4. 80 dB
The human ear can hear sounds having frequency in range
  1. between 200 - 20,000 Hz
  2. between 20 - 2000 Hz
  3. between 200 - 2000 Hz
  4. between 20 - 20,000 Hz
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