Answer :
Air gap means that the dielectric is air.
So ε0 = 8.85 x 10^-12 [F/m].......................permitivity of free space
Lets use the equation
C= ( ε0x A) / d
Where A is the area of the plate
And d the distance between the plates
d = 3.2-mm = 3.2 E-3 m
so ............> A = C *d /ε0 = 0.20 F * 3.2 E-3 m / 8.85 x 10^-12 [F/m]
A = 7.23 E 7 [m2]
So ε0 = 8.85 x 10^-12 [F/m].......................permitivity of free space
Lets use the equation
C= ( ε0x A) / d
Where A is the area of the plate
And d the distance between the plates
d = 3.2-mm = 3.2 E-3 m
so ............> A = C *d /ε0 = 0.20 F * 3.2 E-3 m / 8.85 x 10^-12 [F/m]
A = 7.23 E 7 [m2]
We have that the Area is mathematically given as
A=7.23e7 m^2
Capacitor
Generally the equation for the Capacitor is mathematically given as
C= ( ε0x A) / d
where
d = 3.2-mm
d= 3.2 e-3 m
Therefore
A = C *dε0
A= 0.20 F * 3.2 E-3 m / 8.85 x 10^-12 [F/m]
A=7.23e7 m^2
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