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A nonconducting sheet of large surface area and thickness d contains uniform charge distribution of density `rho`. Find the electric field at a point P inside the plate, at a distance x from the central plane. Draw a qualitative graph of E against x for `0ltxltltd`.

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We know `oint E. ds = q/ epsilon_0`
` E. x. d = (rho(x^2) d / epsilon_0), E= (rho x / epsilon_0)` .
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