MCQ
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$\frac{{{\varepsilon _0}AV_0^2}}{{3d}}$
- ✓$\frac{{{\varepsilon _0}AV_0^2}}{d}$
