Your radio station needs a new coaxial cable to connect the transmitter and antenna. One possible cable consists of a 2.0-mm-diameter inner conductor…

Your radio station needs a new coaxial cable to connect the transmitter and antenna. One possible cable consists of a 2.0-mm-diameter inner conductor and an outer conductor with diameter 1.6 cm and negligible thickness (see the figure); the maximum safe potential difference between the conductors is 2 kV. In your application, the conductors carry charge densities ± 62 nC/m . will this cable work?

https://session.masteringphysics.com/problemAsset/2170186/1/RW-22-49.jpg

I know the answer is No. but why?