Which is the only source of sound that produces pure notes?
Tuning fork.
Sound produced from a flute.
Sound produced by voice box in humans.
None of these.
A periodic wave is characterized by
frequency only
amplitude only
time period only
all the above
Pitch is a/an
Objective quantity.
Subjective quantity.
Measurable quantity.
None of these .
If the distance between a crest and its consecutive through is L, then the wavelength is given by
L/2
L
4 L
2 L
Which of the following type of wave is different from others?
Lights waves
X-rays
Radio waves
Sound waves
Vibrations, whose amplitude of oscillations decreases with time are called
free vibrations
forced vibrations
damped vibrations
none of these
The quantity of intensity of sound wave is
Subjective
Objective
Scalar
None of these
The speed of a wave is 340 ms-1. What is the wavelength of the wave if its frequency is 500 Hz?
0.68 m
6.8 m
68 m
0.68 cm
Waves produced by supersonic jet planes are
shock waves
seismic waves
infrasonics
The safe limit of sound level in dB for our ears is
up to 240 dB
up to 120 dB
0 dB to 10 dB
up to 150 dB
