Question

express dielectric constant in terms of capacitance

Answer 1

The effective dielectric constant is a seen to be a function of the ratio of the width to the height of a microstrip line (W/H), as well as the dielectric constant of the substrate material.

Answer 2

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$\huge\green{ANSWER}$

Dielectric constant of a medium is defined as the ratio of the capacitance of a capacitor with the dielectric as the medium to its capacitance with vacuum between its plates.