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A parallel plate capacitor has plate area $A$ and separation $d$. It is charged to a potential difference $V_o$. The charging battery is disconnected and the plates are pulled apart to three times the initial separation. The work required to separate the plates is
  • A$\frac{{3{\varepsilon _0}AV_0^2}}{d}$
  • B$\frac{{{\varepsilon _0}AV_0^2}}{{2d}}$
  • C$\frac{{{\varepsilon _0}AV_0^2}}{{3d}}$
  • D$\frac{{{\varepsilon _0}AV_0^2}}{d}$
Medium
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