Question

The radius of the wire in a coaxial cable is .65mm and the inner radius of the coaxial conducting cylinder is 1.45mm assuming that there is vacuum between the wire and cylinder calculate the capacitance of a 1.5m length of cable

Answer 1

Answer on Question #74652, Physics / Electric Circuits

The radius of the wire in a coaxial cable is .65mm and the inner radius of the coaxial conducting cylinder is 1.45mm assuming that there is vacuum between the wire and cylinder calculate the capacitance of a 1.5m length of cable

Solution.

$$C = \frac {2 \cdot \pi \cdot \xi \cdot \xi_ {0} \cdot l}{\ln (R _ {2} / R _ {1})}$$ $$C = \frac {2 \cdot 3 , 1 4 \cdot 1 \cdot 8 , 8 5 \cdot 1 0 ^ {- 1 2} \cdot 1 , 5}{\ln (1 . 4 5 / 0 . 6 5)} = 1 0 4 p F$$

Answer: $C = 104 \, pF$

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