Which material has the least resistance to the flow of electricity?
Materials that have low resistance to electric current are called electric conductors. Many metals—including copper, aluminum, and steel—are good conductors of electricity.
Which of the following has the lowest electrical resistance?
Silver has the lowest electrical resistivity among the given elements.
What is a metal that has low resistance?
Elements such as copper and aluminum are known for their low levels of resistivity. Silver and gold in particular have a very low resistivity, but for obvious cost reasons their use is restricted. Resistivity is affected by temperature — for most materials the resistivity increases with temperature.
Why do metals offer less resistance?
Answer:Conductors have number of free electrons in them hence they have low resistance. As number of electrons increases resistance of the matter decreases because number of electrons will decide flow of current or heat through it.
Are metals that generally have the least resistance?
As mentioned metals have low resistance; insulators have high resistance. Metals like nichrome(nickel + chromium) and mercury are much poorer conductors. In general thicker wires offer less resistance. The greater area provides more room for electrons to move through.
Which of the following metals offer the most electrical resistance?
Silver has the highest electrical conductivity of all metals. In fact, silver defines conductivity – all other metals are compared against it. On a scale of 0 to 100, silver ranks 100, with copper at 97 and gold at 76.
What is the least resistant material?
Copper and aluminum are among the least expensive materials with suitable conducting ability to permit their use in wires of household circuits.
Variables Affecting Electrical Resistance.
|Silver||1.59 x 10–8|
|Copper||1.7 x 10–8|
|Gold||2.2 x 10–8|
|Aluminum||2.8 x 10–8|
Which of the following material has the lowest resistivity?
The correct answer is (B) Silver. Silver has the lowest resistivity with the highest thermal conductivity. The resistivity of silver is about 1.59 * 10–8Ω m at 20° C, which is the lowest among all other metals. Explore more such questions and answers at BYJU’S.
Which conductor in the table has the lowest resistance?
For materials with the same length, L, and area, A, the resistivity, ρ, makes the difference. A material with a lower resistivity is a better conductor. Copper is the best conductor because it has the lowest resistivity.
What is low resistance wire?
In most applications, a lower resistance means less power is converted to heat and lost to the surrounding environment and more of the supplied power gets to its intended destination. It also means that the wire and cable will run cooler and the power source can be smaller for a given load.
Why do metals have electrical resistance?
Most metals have electrical resistance. In simpler models (non quantum mechanical models) this can be explained by replacing electrons and the crystal lattice by a wave-like structure. When the electron wave travels through the lattice, the waves interfere, which causes resistance.
Why do conductors have less resistance?
The larger conductor will have a lower resistance due to the increased volume of conductive material. Because resistance is determined by the material and the material’s volume resistivity (resistance per unit volume), the more volume of material you have, the lower the resistance will be.