A two wire transmission line has a capacitance of `20 pF//m` and a characterstic impedance of `50Omega`
(`a`) What is the inductance per metre of this cable?
(`b`) Determine the impedance of an infinitely long section of such cable.

Explanation

(`a`) The characterstic impedance. `Z=sqrt(L//C)`
`L=(Z^(2))(C )=(50)^(2)(20xx10^(-12))H=0.05H//m`
(`b`) The characteristic impedance of a transmission line is the impedance that an infinite length of line would present to a power supply at the input end of the line. Thus,`Z_(infty)=Z_(0)=50Omega`