Sound

Total Questions: 17

1 - Sound can not travel through ----:
A ) Air
B ) Vacuum ✅
C ) Sand
D ) Water

2 - اواز کا ٹکرا کر واپس انا کیا کہلاتا ہے؟
A ) Reflection
B ) Refraction ✅
C ) Diffraction
D ) None of these

3 - Loud speaker voice is increase due to-----:
A ) Spectrum technology
B ) High frequency ✅
C ) High energy
D ) None of these

4 - What is the speed of sound in air?

A ) 1347 km/h
B ) 1235 km/ h ✅
C ) 1290 km / h
D ) 1495 km / h

5 - Speed of sound maximum in-------:
A ) Vacuum
B ) Gas
C ) Solid ✅
D ) Liquid

6 - Among the following mediums velocity of sound is the maximum in?

A ) Air
B ) Vacuum ✅
C ) Steel
D ) Water

7 - The frequency of sound in air is measured in--------:
A ) Watts
B ) Hertz ✅
C ) Joules
D ) Decibels

8 - Speed of sound will be maximum in--------:
A ) Air at 0°
B ) Water at 25 degree
C ) Water at 90 ° ✅
D ) None of these

9 - The speed of sound is minimum in-----:
A ) Steel
B ) air at 0° ✅
C ) Water at 25 °C
D ) None of these

10 - What is the speed of sound in tissue?

A ) 1530 m/s
B ) 1540 m/s ✅
C ) 1550 m/s
D ) None

11 - How many times sound travels faster than air:
A ) Four ✅
B ) Three
C ) Six
D ) None of these

12 - What is the freezing point of water in Fahrenheit?

A ) 32°F ✅
B ) 36°F
C ) 38°F
D ) 39°F

13 - Which of the following is a property of sound waves?

A ) They required a medium to travel ✅
B ) They can travel through a vacuum
C ) There are transverse wave
D ) None of these

14 - What is the effect of higher frequency on sound Waves?

A ) Higher pitch ✅
B ) Lower pitch
C ) More absorption
D ) More diffraction

15 - Which of these factors does not affect sound velocity?

A ) Medium
B ) Frequency ✅
C ) Humidity
D ) Temperature

16 - The amplitude of sound determines the:
A ) Volume ✅
B ) Pitch
C ) Frequency
D ) Speed

17 - The volume of water expands what percent at freezing?

A ) 3%
B ) 6%
C ) 9% ✅
D ) 12%
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