$1$

The capacitance of a parallel$-$plate capacitor is $24F$ when the plates are separated by a material having a dielectric constant equal to $2\mathrm{.}0.$ If this material is removed, leaving air between the plates, and the separation between the plates is tripled, the capacitance is

unchanged.

$16F.$

$36F.$

$0\mathrm{.}14$ mF $.$

$4\mathrm{.}0F.$