Answer :

Given-


Area of the plate= 100 cm2 = 0.01m


Separation between the plates = 0.500 cm = 5 × 10-3 m


Thickness of the metal, t = 4 × 10-3 m


We know capacitance is given by



Where


A= area of cross section


K = dielectric constant


d= separation between the slab and


0 = permittivity of free space = 8.85×10-12


t = Thickness of the metal


Since, it’s a metal, for metals k = infinite


Hence, capacitance is given by-




=


Here capacitance is a constant value, hence the capacitance


is independent of the position of the metal.


At any position, the net separation is dt).


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