1. The problem statement, all variables and given/known data A flat capacitor formed by two square plates of side 0.3 m which are 2 mm apart. Source keeps voltage 250 V on the plates. What current flows between the plates and the source if the condenser is immersing in kerosene at velocity of 5 mm / s? The relative permittivity of kerosene is 2. 2. Relevant equations - 3. The attempt at a solution Here is a pic I=Q/t Because of the fact that immersing cunductor can be understood as two parallel conductors the capacity of an immersed conductor (the depth x = v*t) is C =(ε0*(a-x)*a)/d + (ε0εr*a*x)/d My question is how do I compute the time in the x = v*t? And sorry for my english.