The electric field between two parallel plates of area \$A\$ is roughly \$E = { Q \over \epsilon A} \$, hence the voltage at a distance \$x\$ apart will be \$V(x) = { Q x\over \epsilon A} \$.

So, doubling the distance will double the voltage.

The electric field approximation will degrade significantly as \$x\$ gets larger than some fraction of some characteristic dimension of the plates.

Does changing the gap between plates change the capacitor voltage?
In my Nissan Micra K11 dashboard, the backlights for the clock and left-hand side of the speedo have stopped working. The dashboard is similar to the one pictured below, with the central clock and fuel/speedo/engine temperature gauges, no rev counter.

What bulb(s) do I need to repair them, and do they need to be all replaced at the same time?
