Suppose you build a capacitor with a plate area of $225$ cm$^2,$ a dielectric thickness of

$1$ mm$,$ and a dielectric constant of $0\mathrm{.}2$ nF$/$m$.$ Calculate the capacitance you would

expect to measure.

Question $4$ options:

$4\mathrm{.}5$ F

$45$ nF

$45$ F

$4\mathrm{.}5$ nF