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JEE Main Physics Class 12 Electromagnetic Induction Questions
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Question : 22
Total: 120
The energy of an electromagnetic wave contained in a small volume oscillates with
[10-Apr-2023 shift 1]
double the frequency of the wave
the frequency of the wave
zero frequency
half the frequency of the wave
Validate
Solution:
double the frequency of the wave
E
=
E
0
s
i
n
(
wt
−
kx
)
Energy density
=
1
2
ε
0
E
net
=
1
2
ε
0
E
0
2
s
i
n
2
(
wt
−
kx
)
=
1
4
ε
0
E
0
2
(
1
−
cos
(
2
wt
−
2
kx
)
)
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