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AMU Engineering 2019 solved paper Solved Paper
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© examsnet.com
Question : 46
Total: 150
A source emits a sound of frequency of
400
H
z
, but the listener hears its to be
390
H
z
. Then
the listener is moving towards the source
the source is moving towards the listener
the listener is moving away from the source
the listener has a defective ear
Validate
Solution:
Real frequency,
n
=
400
H
z
Apparent frequency,
n
′
=
390
H
z
n
′
<
n
So, the distance between the source and listener increases or the listener is moving away from source.
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