A capacitor is constructed so the plate separation can be changed. The plates have an area of $1$:$5$ m$2$

and are initially separated by $0$:$50$ mm$.$ The capacitor is charged to a potential di$$erence of $95$ V and

the charging source is removed. What is the potential di$$erence if the plate separation is now increased to

$1$:$8$ mm$?$