The distance between two electricity pylons is 60 m
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
The distance between two electricity pylons is 60 m. The cable that connects the two pylons is 62 m in length.
Why is the cable longer than the distance between the two pylons?
(A) to allow for contraction of the cable in cold weather
(B) to create a slope in the cable for electrons to flow down
(C) to keep the current low and the voltage high
(D) to reduce magnetic fields around the cable