Two infinitely long parallel conducting plates having surface charge densities \( +\sigma \) and...

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Two infinitely long parallel conducting plates having surface charge densities \( +\sigma \) and \( -\sigma \), respectively, are separated by a small distance. The medium between the plates is vacuum. If \( \varepsilon_{0} \) is the dielectric permittivity of vacuum, then the electrie field in the region between the plates is
(A) \( \mathrm{O} \) volts/rmetre
(B) \( \frac{\sigma}{2 e_{o}} \) volts/metre
(C) \( \frac{\sigma}{\varepsilon_{o}} \) volts/metre
(D) \( \frac{2 \sigma}{E_{o}} \) volts/metre
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