You take some data with Nichrome wire and you have a plot of R vs. LA -1 with th

Question

You take some data with Nichrome wire and you have a plot of R vs. LA-1 with the following equation
from your computer y = 0.93 * x + 0.4.
Someone gives you the same wire with a length of 10 [meters] and X-sec. Area of 0.22 [mm2].
What resistance will you probably measure for the entire length of wire? You measure it the same way as you measured your data.

You take some data with Nichrome wire and you have a plot of R vs. LA-1 with the following equation
from your computer y = 0.892 * x + 0.2.
What is the resistivity for this wire?

You take some data with Nichrome wire and you have a plot of R vs. LA-1 with the following equation
from your computer y = 0.878 * x + 1.1.
What is the conductivity for this wire?

Explanation / Answer

y = 0.93 * x + 0.4

Here y is the resistance which we need to find

x = length / area = 10*1000 / 0.22 = 45454.4 mm

Therefore,

y = 0.93 * 45454.4 + 0.4

y = 42273.1

------------------------------------------------------------------------------------------------
y = 0.892 * x + 0.2

Resistivity of wire is 0.892

---------------------------------------------------------------------------------------------------

y = 0.878 * x + 1.1

resistivity = 0.878

conductivity = 1/resistivity

consuctivity = 1/0.878 = 1.1389

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.