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In an electromagnetic wave, the amplitud...

In an electromagnetic wave, the amplitude of electric field is 10 V/m. The frequency of wave is `5 x10^(14)` Hz, the wave is propagating along z–axis, then total average energy density of E.M. wave is

A

`2.21 xx 10^(–10) J//m^(3)`

B

`4.42xx10^(-10)J//m^(3)`

C

`1.11xx10^(-10)J//m^(3)`

D

None

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The correct Answer is:
A
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MOTION-ELECTRO MAGNETIC WAVES -EXERCISE - 2
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  2. Which one statement is incorrect about electromagnetic wave

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  3. In an electromagnetic wave, the amplitude of electric field is 10 V/m....

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  4. To establish an instantaneous displacement current of 2A in the space ...

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  5. Which of the following have zero average value in a plane electromagne...

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  6. Which one statement is incorrect

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  7. A plane electromagnetic wave of frequency 25 Mhz travels in free space...

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  8. Displacement current is

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  9. In a plane electromagnetic wave propagating in space has an electric f...

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  10. A radiowave has a maximum magnetic field induction of 10^(–4) T on arr...

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  11. A capacitor is having a capacity of 2pF. Electric field across the cap...

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  12. The shortest wavelength is for

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  13. An accelerated charge

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  14. The electromagnetic radiations are in descending order of wavelength i...

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  15. X -rays and gamma rays are both electromagnetic waves. Which of the fo...

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  16. Which of the following are not electromagnetic waves ?

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  17. The frequencies of X-rays, gamma-rays and ultraviolet rays are respect...

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  18. A plane electromagnetic wave of frequency 40 MHz travels in free space...

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  19. In Q.30, the magnitude and direction of magnetic field will be

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  20. The waves related to telecommuni-cation are-

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