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A very long charged wire (lying in the x...

A very long charged wire (lying in the xy plane ) which is having a linear charge density `lambda` is having one of its end at a point P as shown in figure . What is electric field intensity at point Q :

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The correct Answer is:
`[|E| = (sqrt2 k lambda)/(r) vecE = (sqrt2klambda)/(r) (-hatj)]`
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