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Poynting vector vec P for an EM wave is...

Poynting vector `vec P` for an EM wave is

A

`vec(P)=vec(E)xxvec(B)`

B

`vec(P)=vec(E)xxvec(H)`

C

`vec(P)=vec(E)/vec(B)`

D

`vec(P)=vec(E)/vec(H)`

Text Solution

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The correct Answer is:
B
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MOTION-ELECTRO MAGNETIC WAVES -EXERCISE - 2
  1. source of an electromagnetic wave is

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  2. The dimension of E/H is that of

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  3. Poynting vector vec P for an EM wave is

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  4. Which one statement is incorrect about electromagnetic wave

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

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

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

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  8. Which one statement is incorrect

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

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  10. Displacement current is

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

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

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

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  14. The shortest wavelength is for

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  15. An accelerated charge

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

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

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  18. Which of the following are not electromagnetic waves ?

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

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

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