In most cases , we cannot see the vibrations because
amplitude is small.
frequency is small.
phase is small.
no phase difference
Two main properties of sound is :
Frequency and amplitude.
Amplitude and phase.
Frequency and phase.
None of these.
The pleasing sounds are called
Music.
Noise.
loudness.
Loudness of sound increases by
I. The amplitude of vibrating body
II. The increase in surface area of vibrating body
III. The decrease in frequency of vibrating body
IV. The increase in distance from the source of sound
I and II only
II and III only
I, II and III only
I, III and IV only
When the eardrum senses the vibrations of sound it sends the signals to the brain.This process is called
Speaking.
Walking.
hearing.
none of these.
Sound can travel through
Solid only
Solid, liquid and gas only
Gas only
Gas and vacuum only
What is the loudness of Busy traffic?
10 dB
30 dB
70 dB
100 dB
What is the loudness of normal breathing?
7dB
9 dB
-10 dB
Which of the following statements is correct?
Sound can travel through vacuum but light cannot
Sound needs medium, but light doesn't needs medium for its propagation
Sound and light both require medium for propogation
Sound and light both cannot travel in a medium
The frequency determines the
shrillness of a sound.
loudness of a sound.
clarity of a sound.
