Admin Table of Contents
- 1 Why telephones lines are not stretched tightly between the telegraph poles?
- 2 Why are the telephone wires not pulled tightly?
- 3 Why are telephone wires left longer than the distance between the poles?
- 4 Why are the wires connected to a post outside are slightly saggy and not tightly tied?
- 5 Why do telephone wires sag?
- 6 Why are the wire that is connected in the posts outside are slightly saggy not tightly tied by the line man?
- 7 Why are the wires that are connected in the posts outside are slightly saggy not tightly tied by the line man?
- 8 Why telephone wires are kept tight between the two poles in winter?
Why telephones lines are not stretched tightly between the telegraph poles?
the wires are made of aluminium which has a property of contracting during winter season. so to avoid breakage of these wires they are fixed loosely between two poles.
Why are the telephone wires not pulled tightly?
Explanation: Telephone wires are kept slightly get free when they are laid because heat. Heat makes metallic wire expand and cold makes the material shrink. Therefore, without a pull they could become too tight and break in winters or pull free from their anchors in summers .
Why are power lines not fully tightened?
During transmission of electricity, heat is being dissipated. The heat generated by cables is being minimized via high voltage transmission. So, the cables are loose so that even if contraction should occur, there won’t be much tension which would lead to the damage of the cables.
Why are telephone wires left longer than the distance between the poles?
Solution: (a) Most telephone wires are made out of copper, which contracts with drop in temperature and hence breaks in winter if it becomes too tight between the poles. (c) The gaps are left between the successive rails for making space for their expansion when there is rise in temperature in summers.
Why are the wires connected to a post outside are slightly saggy and not tightly tied?
Why the electric wire that is connecting in the post outside a little bit saggy and not tightly tied? So that it will not break once the wire will expand c. So that it will not hard for the line men to reach it.
Why are wires between two poles given a certain amount of sag?
The lines are often heavily loaded because of increased power consumption, and the conductors, which are generally made of copper or aluminum, expand when heated. That expansion increases the slack between transmission line structures, causing them to sag.
Why do telephone wires sag?
Why are the wire that is connected in the posts outside are slightly saggy not tightly tied by the line man?
Why do telephone lines sag?
Why are the wires that are connected in the posts outside are slightly saggy not tightly tied by the line man?
Why telephone wires are kept tight between the two poles in winter?
Telephone wires are kept tight between the two poles in winter because the cores of overhead wires are made from copper. The higher temperatures in summer make the copper expand – so the lines get slightly longer. In winter, the reverse happens – the lines contract and tighten up.
When telephone wires are made they are not pulled together tightly because on cold days they can contract and snap?
The wires expand when exposed to intense heat from sun and contract during cold weather. Stretching the wire and connecting to the poles will make the wires loosen up and tear easily. This might lead to an accident. So they are allowed to sag and tied loosely to the electric poles.