capacitance cylinder 1. The problem statement, all variables and given/known data Hey guys! :) I have an exam tomorrow i am a stuck with this question while reviewing :S.. Can anyone help me plz? consider a cylinder capacitor of lenght 1m , inner radius 0.1cm and outter radius 0.2cm. You connect the capacitor to a 10V battery. What is the electric field strength at the inner radius? a) 0v/m b)infinity c)7.7 kv/m d)14.4kV/m 2. Relevant equations C= k*L/ln(b/a) q=C*V E=V/d E=k*q/R^2 3. The attempt at a solution first capacitance of a cylindrical capacitor is known to be C=K*L/ln(b/a) (b=0.5/a=0.1) then i thought to calculte the charge q=C.V but i can't see the relation to find the electric field E :S and also the thing about the inner radium made me confused..