Question

in a parralel plate capacitor the capacitance increases from 4- 80 micro coloumb on introducing a dielectric slab of thickness equal to plate separation .calculate the dielectric constant of the medium.

Answer 1

capacitance before introducing the dielectric = 4 units
Afterwards = 80 units

Dielectric constant = 80/4= 20

The numbers given are not clear. But the answer is the ratio.