1. The problem statement, all variables and given/known data A parallel plane capacitor with conducting plates area [tex]\Sigma[/tex]= 400cm2, distant d=5mm, is half filled of mica (k1=5) and half filled of paraffin (k2=2). Calculate: a) C (Capacitance of the capacitor) ...others 2. Relevant equations None 3. The attempt at a solution I haven't got too many problems solving this exercise but i just don't know how to get to the correct result of k (relative dielectric constant) when there's more than one dielectric in a parallel plate capacitor.