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Byju's Answer
Standard XIII
Physics
Wave Speed
In sound wave...
Question
In sound wave,
V
w
is the wave velocity and
V
p
is particle velocity. Then:
A
→
V
w
|
|
→
V
p
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B
→
V
w
⊥
→
V
p
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C
→
V
w
×
→
V
p
=
0
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D
→
V
w
.
→
V
p
=
0
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Solution
The correct option is
C
→
V
w
×
→
V
p
=
0
Sound wave is a longitudinal wave in which direction of both particle velocity and wave velocity are parallel.
i.e
→
V
w
|
|
→
V
p
→
V
w
×
→
V
p
=
V
w
V
p
sin
0
∘
=
0
and
→
V
w
.
→
V
p
=
V
p
V
w
cos
0
∘
≠
0
Hence, option (a) and (c) are correct.
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