Conceptual Physics

Capacitance with dielectric

present

Cț = țC

Cț = capacitance with dielectric

ț = dielectric constant

C = capacitance with vacuum

Table of dielectric constants

The capacitors have identical

dimensions and charges. What is

the dielectric constant of the

dielectric on the right?

ț = Evacuum/Edielectric

ț = (4.0 × 10^3 V/m) / (2.8 × 10^3 V/m)

ț = 1.4 (dimensionless)