Determine the resistivity for various metals


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LABORATORY WORK#2


LABORATORY WORK #2

DETERMINE THE RESISTIVITY FOR VARIOUS METALS


Task#1


1.Assemble this circuit.

2. Select material (e.g. aluminum), length and cross-sectional area of the conductor (be careful about units), enter this data into the table.

3. Measure the voltage and current on the conductor, calculate its resistance, enter this data in the table.

4. Determine the formula for the resistivity based on this formula



R- resistance, A – cross-sectional area, L-length,

ρ – resistivity.

5. Enter formula and value of resistivity in the table.

6. Select another material and repeat steps 2-5.

7. Perform work for at least five types of materials, all enter the data in table 1.

8. Using table 2, determine the percentage uncertainty by the formula

enter the data in table 1



9. Insert screenshot of circuit board.




TABLE 1

Material

L/m

A/m2

I/A

U/V

R/Ω

Formula for ρ

ρ/Ω∙m



Silver

22

1 *10^-6

2.28

0.81

0.355



1.61*10^-8

1.23

Alluminium

10

1*10^-5

4.57

0.12

0.0263

2.63*10^-8

1.50

Gold

30

5*10^-6

3.36

0.48

0.143

2.38*10^-8

8.18

Iron

100

1*10^-3

4.84

0.04

0.0083

8.30*10^-8

17.82

Platinum

0.1

2*10^-6

4.91

0.02

0.004

8*10^-8

24.39



























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