The separation be

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 d − t).