Solve this: Q. A cylindrical capacitor has two co-axial cylinders of length 20 cm and radii 2r and r. Inner cylinder is given a charge 10 μ C and outer cylinder a charge of -10 μ C. The potential difference between the two cylinders will be 1 0 . 1 In 2 4 πε 0 mV 2 In 2 4 πε 0 mV 3 10 In 2 4 πε 0 mV 4 0 . 01 In 2 4 πε 0 mV Share with your friends Share 10 Sandeep K. Gupta answered this Dear Student, Regards. 37 View Full Answer