Question

A single-phase line consists of two long solid conductors, each having a radius of r metre separated by a distance of D metre. What will be the capacitance between the line

• A. $0.0121\times log\left(\frac{D}{r}\right)\mu F/km$
• B. $\frac{0.121}{log\left(\frac{D}{r}\right)}\mu F/km$
• C. $\frac{0.121}{log\left(\frac{r}{D}\right)}\mu F/km$
• D. $\frac{0.0121}{log\left(\frac{D}{r}\right)}\mu F/km$

Answer 1

The correct option is D $\frac{0.0121}{log\left(\frac{D}{r}\right)}\mu F/km$

$C_{AB}=\frac{0.0121}{log\left(\frac{D}{r}\right)}\mu F/km$