A charge \( Q \) is uniformly distributed over a large plastic plate. The electric field at poin...

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A charge \( Q \) is uniformly distributed over a large plastic plate. The electric field at point \( P \), close to the centre of the plate is
\( \mathrm{P} \) \( 10 \mathrm{~V} \mathrm{~m}^{-1} \). If the plastic plate is replaced by a copper plate of the

W. same dimensions and carrying same charge \( Q \) then the electric field at the point \( P \) will be
(A) \( 5 \mathrm{~V} \mathrm{~m}^{-1} \)
(B) zero
(C) \( 10 \mathrm{~V} \mathrm{~m}^{-1} \)
(D) \( 20 \mathrm{Vm}^{-1} \)
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