The space between the inner wire of radius a = 1 mm of a co-axial cable and the conducting shield of radius b = 8 mm is made of nylon ($\kappa$ = 4.2).The capacitance per meter is
A)13.4 pF
B)26.8 pF
C)35.8 pF
D)56.2 pF
E)112 pF

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The Answer of The space between the inner wire of radius a = 1 mm of a co-axial cable and the conducting shield of radius b = 8 mm is made of nylon ($\kappa$ = 4.2).The capacitance per meter is
A)13.4 pF
B)26.8 pF
C)35.8 pF
D)56.2 pF
E)112 pF

The Space Between the Inner Wire of Radius a = κ\kappaκ

The Space Between the Inner Wire of Radius a = $\kappa$