1. The problem statement, all variables and given/known data A parallel-plate capacitor consists of two square plates, size L x L, separated by distance d. The plates are given charge +-Q . Each part changes only one quantity; the other quantities have their initial values. Part A What is the ratio E(final)/E(initial) of the final to initial electric field strengths if Q is doubled? 2. Relevant equations I know that:E = kQ/r^2 ,where k= 8.99*10^9 3. The attempt at a solution I am not sure where to start here for this question. Since it is a ratio of E final / E initial would Q cause E to be something like this? E = k(2Q)/r^2 => 1/2E for E final?