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electri field


 

6 years ago

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Answers : (1)

										

Dear student,


\includegraphics[scale=.8]{EfieldDisk.eps}

Starting with the general formula for a surface charge


$\displaystyle {\bf E} = \frac{1}{4 \pi \epsilon_0} \int \frac{\sigma(r')({\bf r} - {\bf r'}) da'}{\left \vert{\bf r} - {\bf r'} \right \vert^3}$


On solving we get


$\displaystyle {\bf E} = \frac{\sigma }{2 \epsilon_0} \left ( 1 - \frac{z}{\sqrt{R^2 + z^2}} \right ) \hat{z} $





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6 years ago

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