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  • In a region of free space the electric field at some instant of time is, <img alt="\mathrm{E=80 i+32 j-64 k}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BE%3D80%20i&plus;32

In a region of free space the electric field at some instant of time is, \mathrm{E=80 i+32 j-64 k} and the magnetic field \mathrm{B=(0.2 i+0.08 j+0.29 k)}. The poynting vector for these fields

Option: 1

\mathrm{11.52 \mathrm{i}-28.8 \mathrm{j}}


Option: 2

\mathrm{i-j}


Option: 3

\mathrm{5i+22j}


Option: 4

\mathrm{2i-18j}


Answers (1)

best_answer

The poynting vector, \mathrm{S=\frac{1}{\mu_0}(E \times B)}

\mathrm{=\frac{1}{4 \pi \times 10^{-7}}\left|\begin{array}{ccc} i & j & k \\ 80 & 32 & -64 \\ 0.2 & 0.08 & 0.29 \end{array}\right|=11.52 i-28.8 \mathrm{j}}

Posted by

Divya Prakash Singh

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