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NCERT Exemplar Solutions Class 9 Science Solutions for Sound - Exercise in Chapter 12 - Sound
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When we change feeble sound to loud sound we increase its
(a) frequency
(b) amplitude
(c) velocity
(d) wavelength
Answer:
The answer is (b) amplitude
Explanation:
The loudness of sound is proportional to amplitude. When amplitude increases feeble sound changes to loud sound.
Video transcript
"hello everyone welcome to lero learning
i am gurpreet your science tutor today's
question is
when we change fever sound to loud sound
we increase its
a frequency b amplitude
c velocity or d wavelength
so out of the four options we have to
find out
which is the correct one when we change
the feeble sound
to a loud sound so
let us start our answer
loudness of a sound
[Music]
of a sound depends on
amplitude that is
loudness is proportional
to amplitude this means
when the amplitude increases the
loudness will
increase so the correct option
for this question will be option
b that is amplitude
when we increase the amplitude of a
feeble sound it will change to a
loud sound for more such videos
please subscribe leader learning and for
any doubts
drop a comment thank you"
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