Underground cable with electrical short

In summary, a 10-km-long underground cable with two parallel wires, each with a resistance of 13 ohm/km, has an electrical short at distance x from the west end when a conducting path of resistance R connects the wires. The total resistance of the wires and the short is 100 ohm when measured from the east end and 200 ohm when measured from the west end. The solutions are (a) x and (b) R.
  • #1
carlyn medona

Homework Statement


A 10-km-long underground cable extends east to west and
consists of two parallel wires, each of which has resistance 13 ohm /km.
An electrical short develops at distance x from the west end when
a conducting path of resistance R
connects the wires (Fig. 27-31). The
resistance of the wires and the short
is then 100 ohm when measured from
the east end and 200 ohm when measured
from the west end. What are
(a) x and (b) R?

Homework Equations

The Attempt at a Solution


Actually I don't know how to start this problem, should the total resistance of wire and R get added up?
 
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  • #2
I actually solved it.
 

Related to Underground cable with electrical short

1. What causes an underground cable to have an electrical short?

There are various factors that can cause an underground cable to have an electrical short. Some common causes include physical damage to the cable, water infiltration, faulty insulation, and improper installation.

2. How can an electrical short in an underground cable be detected?

An electrical short can be detected through various methods, including visual inspection, using specialized equipment such as cable fault locators, and conducting insulation resistance tests. It is important to regularly check for any potential issues to prevent electrical shorts from occurring.

3. What are the dangers of an electrical short in an underground cable?

An electrical short in an underground cable can pose serious safety hazards, such as electric shock, fires, and explosions. It can also cause damage to electrical equipment and disrupt power supply for homes and businesses.

4. How can an underground cable with an electrical short be repaired?

The repair process for an underground cable with an electrical short depends on the severity and location of the short. In some cases, the damaged section of the cable may need to be replaced, while in others, the short can be repaired using specialized techniques such as splicing or insulation repair.

5. How can I prevent an electrical short in an underground cable?

To prevent electrical shorts in underground cables, it is important to ensure proper installation and maintenance of the cables. This includes regular inspections, using high-quality materials, and following proper safety protocols. It is also important to avoid any activities that can cause physical damage to the cables, such as digging or construction work near the cables.

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