An infintie nonconducting sheet a surface density of change `sigma` Around the foot og the perpendicular from a point P a circle of radius r is drawn .Find the valume of r at which the field at P product by changes inside this circle is half of the total strength of the feld due to the entire sheet . The distance of the point P is a from the plane.

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1.	An infintie nonconducting sheet a surface density of change `sigma` Around the foot og the perpendicular from a point P a circle of radius r is drawn .Find the valume of r at which the field at P product by changes inside this circle is half of the total strength of the feld due to the entire sheet . The distance of the point P is a from the plane.
Answer» Correct Answer - `r=sqrt()3a`

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