2007-09-23 09:50:29 · 4 answers · asked by varghese p 3 in Science & Mathematics ➔ Physics
Needs to scientific
2007-09-23 09:56:33 · update #1
Copper wires in free-anchored applications and outdoor cables undergo a great deal of flexing, and need to withstand being deformation-bent over and over and over without failing. They often must experience extremes of heat and cold, which can shorten the useful lifetimes of the metal due to crystallization leading to brittleness. If the copper breaks, even if the broken ends remain in contact, the amount of electricity it can conduct will be reduced at best. If the conduction is interrupted, the broken ends can arc or burn, or short circuit. In some wiring applications, the amount of electricity that the wires carry has to be very precise. Reduced ductility from being bent or deformed too many times can affect that precision in nearly the same way as a spot impurity.
Also, there is a difference between being flexed spring-style, where the metal returns to its original shape and position when released, and being bent, dented or deformed, where the internal structure of the metal is pushed past the "shear" stress point. Ductile metals such as copper are said to "Flow" under such stress without fracture.
2007-09-23 10:15:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Copper has a higher electrical conductivity if it is pure. Such copper also just happens to be highly ductile. This comes in handy when making electrical connections, because the contact area can be easily squashed to give it a high surface area. It also comes in handy when guiding it around tight spots and having it stay in place.
2007-09-23 12:24:06 · answer #2 · answered by Dr. R 7 · 0⤊ 0⤋
copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.
2015-07-02 23:02:08 · answer #3 · answered by john 4 · 1⤊ 0⤋
the wire will might melt if the wire is not tough and if it does not conduct electricity or get burnt . if the wire is not ductile it cannot be bent. and if it doesnt conduct electricity there is no use with the wire
2016-05-17 05:45:41 · answer #4 · answered by stefani 3 · 0⤊ 0⤋