Register to reply 
Maximum potential (coaxial cable) 
Share this thread: 
#1
Mar2311, 08:32 AM

P: 33

1. The problem statement, all variables and given/known data
Given a coaxial cable with outer conductor of radius b, and inner conductor of radius a. Prove that maximum potential is obtained when a = b /e, e is base of natural log. 2. Relevant equations gauss law, ... 3. The attempt at a solution By using Gauss Law, for a < r < b, i have E = 2*k*[tex]\lambda[/tex] / r, where [tex]\lambda[/tex] = Q/L then the potential difference, V= [tex]\int[/tex] E dr V = 2*k*[tex]\lambda[/tex] ln (b/a), but i am not sure how to continue by differentiating V wrt a. Help me pls... Thank you. 


#2
Mar2311, 08:47 PM

P: 33

Anyone pls help ......



Register to reply 
Related Discussions  
Coaxial Cable  Introductory Physics Homework  6  
Capacitance of coaxial cable  Introductory Physics Homework  5  
Coaxial cable?  Introductory Physics Homework  2  
Coaxial cable  General Physics  0  
Vector potential in a coaxial cable  Advanced Physics Homework  5 