The energy associated with electric field is (Us) and with magnetic field is (UB) for an electromagnetic wave in free space. Then:
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a. |
UE = |
b. |
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c. |
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d. |
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Question ID - 50144 | SaraNextGen Answer The energy associated with electric field is (Us) and with magnetic field is (UB) for an electromagnetic wave in free space. Then:
a.
UE = 
b.
c.
d.
The energy associated with electric field is (Us) and with magnetic field is (UB) for an electromagnetic wave in free space. Then:
|
a. |
UE = |
b. |
|
|
c. |
|
d. |
|
1 Answer - 5876 Votes
3537
Answer Key : (c) -
Answer LinkAverage energy density of magnetic field. UB=
, B0 is maximum value of magnetic field. Average energy density of electric field,
UE =
Now, 
UE =
=
UE = UB
Since energy density of electric & magnetic field is same, energy associated with equal volume will equal.
UE=UB
