Question

The capacitance per unit length of a very long coaxial cable, made of two concentric cylinders,...

The capacitance per unit length of a very long coaxial cable, made of two concentric cylinders, is 50 pF/m. What is the radius of the outer cylinder if the radius of the inner one is 1.0 mm? (k = 1/4??0 = 8.99 � 109 N ? m2/C2)
Answer

0.50 mm

3.0 mm

4.0 mm

2.0 mm

1.0 mm
0 0
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Solution: Considerthe formula to findthe capacitanceper unit lengthis Here, L-Length of the coax ial cable i.e. 1m (..Unitlen

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