Electricity

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7 Feb 2010 18:33:00 IST
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How to calculate electric flux through a cube of side A, due to a point charge 'q' kept at one of it
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How to calculate electric flux through a cube of side A, due to a point charge 'q' kept at one of its vertices?



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Yagyadutt Mishra's Avatar

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Joined: 19 Feb 2009
Posts: 1958
7 Feb 2010 18:47:49 IST
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 Hello!!!!

 

For such type of Question you should know few concept of Solid state...

 

A spherical body kept at the corner of CUBE contribute 1/8 of its part inside the cube and 7/8 part outside.

 

A spherical body kept at the edge of CUBE contribute 1/4 of its part inside and 3/4 out side...

 

A spherical body kept at the center of CUBE contribute its whole part inside the cube.

 

A spherical body kept at the Faces contribute 1/2 of its part inside the cube.

 

 

Now for your Case when charge is kept at the corner...Then total flux through the cube will be only due to q/8 ...

 

So Flux is equal to q/8epsilon


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Joined: 7 Aug 2009
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7 Feb 2010 18:57:40 IST
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Hello Sir, I did the flux question using exactly the same concept. But I wanted to know whether there was any mathematical proof of it?



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