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(C) The electric field $E$ at a distance $r$ from a source is given by:$1$. For a point charge: $E \propto 1/r^2$$2$. For an electric dipole: $E \prop

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$A$ plane infinite sheet of charge

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(C) The electric field $E$ at a distance $r$ from a source is given by:$1$. For a point charge: $E \propto 1/r^2$$2$. For an electric dipole: $E \propto 1/r^3$$3$. For an infinite line charge: $E \propto 1/r$$4$. For an infinite plane sheet of charge: $E = \sigma / (2 \varepsilon_0)$,which is independent of $r$ (i.e.,$E \propto r^0$).Therefore,the electric field varies as $r^0$ for an infinite plane sheet of charge.

Electric field at a point varies as $r^0$ for

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