Aluminum is now most commonly used conductor in transmission line than copper because

A conductor is composed of seven identical copper stands each having a radius r, the self GMD of the conductor is

Skin effect shows that

Non uniformity of the current distribution is also caused by

Total number of strands (N) in concentrically stranded cable with total annual space filled with strands of uniform diameter is given by (if x is the number of layers wherein the single central strand is counted as the first layer)

Which of the following is correct?
1. Bundle conductor reduces the corona loss
2. Bundle conductor increases the inductance and reduces the capacitance
3. Corona loss causes radio interference in adjoining telephone lines

Bundle conductors are used in transmission lines, effective capacitance and inductance is respectively

Transmission lines are transposed to

In a transmission line, distributed constants are

Skin effect is more pronounced at