PE sample power 537

[kduff70]

I was going over problem 537 of the Pe sample exam . To get a good understanding of this question would the  Icharging current flow through the line length of a conductor  acting as shunt capacitor to ground therefore the line length , the voltage to ground and the radius of the conductor would play a part in Icharging current. If this is the case shouldn't the radius of the conductor be included in this type of problem? any help with problem would be greatly appreciated

 

[jnspark]

I agree too.  the equation for capacitance is  



Which has radius in the equation.  I think it plays a tiny role in the equation compared to length and voltage, but still proportional.  

What are we missing?

 

[JMuhs]

The length of the line and the voltage are directly (interpret linearly) proportional to the charging current. The radius of conductors is "positively" correlated but varies by a factor of log10, so is not directly/linearly proportional. This is a very confusing question in my opinion centering around the definition of "directly proportional".