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Q.

The maximum electric field of a plane electromagnetic wave is 88 V/m. The average energy density is

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a

13.7 ×10-8 Jm-3

b

6.8 ×10-8 Jm-3

c

3.4 ×10-8 Jm-3

d

1.7 ×10-8 Jm-3

answer is A.

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Detailed Solution

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Average energy density = 120E02

=12 x 8.8 x 10-12 x 88 x 88=3.4 x 10-8 Jm-3

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