The separation between two electricity pylons is $60\text{ m}$. An engineer installs a cable with a length of $62\text{ m}$ between the pylons. Why does the engineer decide to use a cable that is longer than the distance 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