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Test Index
JEE Main Physics Class 11 Waves Part 1 Questions
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© examsnet.com
Question : 83
Total: 100
Statement - 1 :
Two longitudinal waves given by equations:
y
1
(
x
,
t
)
=
2
a
sin
(
ω
t
−
k
x
)
and
y
2
(
x
,
t
)
=
a
sin
(
2
ω
t
−
2
k
x
)
will have equal intensity.
Statement - 2 :
Intensity of waves of given frequency in same medium is proportional to square of amplitude only.
[2011 RS]
Statement-1 is true, statement-2 is false.
Statement-1 is true, statement-2 is true, statement2 is the correct explanation of statement-1
Statement-1 is true, statement-2 is true, statement2 is not the correct explanation of statement-1
Statement-1 is false, statement-2 is true.
Validate
Solution:
Intensity of a wave
I
=
1
2
p
w
2
A
2
v
Since,
I
∝
A
2
ω
2
∴
I
1
∝
(
2
a
)
2
ω
2
and
I
2
∝
a
2
(
2
ω
)
2
I
1
=
I
2
In the same medium,
p
and
v
are same.
Intensity depends on amplitude and frequency.
© examsnet.com
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