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Electricity

Cool goIITian

Joined:	3 Apr 2008
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11 Apr 2009 13:54:20 IST

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A charged particle q is placed at the centerO of cube of length L (ABCDEFGH). Another same

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A charged particle q is placed at the centerO of cube of length L (ABCDEFGH). Another same charge q is placed at a distance L from O. Then the electron flux emerging from q at O is a ) q/4Lb ) zeroc ) q/(2L)d ) q/(3L) I know that answer is 0,,but how,,plz explain

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manish gupta

Forum Expert

Joined: 5 Mar 2010

Posts: 51

10 Mar 2010 19:13:49 IST

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electric flux = electric field *area . consider a small area around o. since the area is small the electric field at all points on the surface will be same. So

flux= E*area

Since at O electric field is 0 hence fux at o is also 0

Dasvidaniya

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Joined: 9 May 2009

Posts: 831

10 Mar 2010 19:26:42 IST

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The flux for both the charges exactly cancels the effect of each other

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