Which of the following statements is not a use of ultrasound?
Ultrasonic treatment of tumors in patients suffering from cancer.
Ultrasonic scanning during pregnancy to check the development of baby.
Ultrasonic cleaning to remove coating of tartar from teeth.
Ultrasound for echo location to determine the depth of water.
The speed of sound through solids, liquids and gases are .................. , ................ and ................... respectively.
Which of the following information completes the given statement?
Slowest, faster and fastest
Average, fastest and slowest
Slowest, fastest and average
Fastest, slower and slowest
Loudness of sound is proportional to the square of the
Frequency of the vibration.
Amplitude of the vibration.
Phase of the vibration.
none of these.
What is sound?
It is form of energy
It is a form of light
It is a form of heat
It is a form of radiation
The to and fro motion of an object is termed as :
vibration.
oscillation.
Modulation.
feedback
What is the loudness of Normal Conversation?
10 dB.
30 dB.
60 db.
None of these.
Mohan fires a gun 150 m from a cliff. His friend Sohan who is standing 300 m further away from the cliff hears the gun 1 second after he sees the flash.
Sohan will hear the echo from the cliff
1 second after seeing the flash
2 seconds after hearing the gun
2 seconds after seeing the flash
4 seconds after hearing the gun
In most cases , we cannot see the vibrations because
amplitude is small.
frequency is small.
phase is small.
no phase difference
The size of vocal chords of men is :
20 mm
19 mm
18 mm
1 cm
Loudness of sound is directly proportional to the
Amplitude of wave
Distance from the source of sound
Frequency of the wave
Wavelength of the wave
