Sound Physics Test 01

Total Questions: 21

1 - Which is an example of a longitudinal wave?

A ) Sound wave ✅
B ) Light wave
C ) Radio wave
D ) Water wave

2 - How does sound travel from source to your ear?

A ) By changes in air pressure ✅
B ) Buy vibration in wires or strings
C ) By electromagnetic waves
D ) buy infrared waves

3 - Which form of energy is sound?

A ) Electrical
B ) Mechanical ✅
C ) Thermal
D ) Chemical

4 - Astronauts is space need to communicate with each other by radio links because:

A ) Sound waves travel very slowly in space.
B ) Sound waves travel very fast in space
C ) Sound waves cannect travel in space ✅
D ) Sound waves have low frequency in space

5 - The loudness of our sound is most closely related to its:

A ) Frequency
B ) Period
C ) Wavelength
D ) Amplitude ✅

6 - For a normal person audible frequency range for sound wave lies between:

A ) 10Hz and 10kHz
B ) 20Hz and 20kHz ✅
C ) 25H and 25kHz
D ) 30Hz and 30kHz

8 - We can distinguish between a shrill and grave sound by its:

A ) Loudness
B ) Amplitude
C ) Area
D ) Pitch ✅

9 - The speed of sound in air at 21°C is:

A ) 336ms-1
B ) 343ms-1 ✅
C ) 430ms-1
D ) 470ms-1

10 - Bats can hear sound of frequency up to:

A ) 100,000Hz
B ) 25000Hz
C ) 120,000Hz ✅
D ) 1000Hz

11 - The unit of intensity of sound:

A ) Wm-1
B ) Wm
C ) Wm-² ✅
D ) Wm²

12 - Frequency of tuning fork depends upon its of prongs:

A ) Weight
B ) Speed
C ) Mass ✅
D ) Distance

13 - The speed of sound in air at 0°C is:

A ) 331ms-¹ ✅
B ) 23s-¹
C ) 376ms-¹
D ) 386ms-¹

15 - Speed of sound in steel at 25°C:

A ) 3880 m/s
B ) 5950 m/s
C ) 6030 m/s
D ) 5960 m/s ✅

16 - The frequency of silent whistle is:

A ) 20,000Hz - 25000Hz ✅
B ) 2000Hz - 25000Hz
C ) 200KHz - 2000 Hz
D ) 2500 KHz

17 - The sound level of rustling of leave is:

A ) 1dB
B ) 20dB
C ) 30dB
D ) 10dB ✅

19 - Old people cannot hear sound above than.

A ) 1000 Hz
B ) 15000 Hz ✅
C ) 20000 Hz
D ) 10000 Hz

21 - The unit of intensity of sound:

A ) Wm-¹
B ) Wm
C ) Wm-² ✅
D ) Wm²