Two infinitely long parallel conducting plates having surface charge densities $+\mathrm{\sigma } \mathrm{and} -\mathrm{\sigma }$, respectively, are separated by a small distance. The medium between the plates is vacuum. If £o is the dielectric permittivity of vacuum, then the electric field in the region between the plates is

• A

  0 volts/metre

• B

  $\frac{\mathrm{\sigma }}{2{\mathrm{\epsilon }}_{\mathrm{o}}}$volts/metre

• C

  $\frac{\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}$volts/metre

• D

  $\frac{2\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}$volts/metre