Two electricity pylons are 60 m apart. An engineer installs a cable measuring 62 m between the pylons. Why does the engineer select a cable that is longer than the gap between the two pylons?
- Ato allow for contraction of the cable in cold weather
- Bto create a slope in the cable for electrons to flow down
- Cto keep the current low and the voltage high
- Dto reduce magnetic fields around the cable