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Jun chen Liu

Micheal Kyriacou

Lab 6

May 16 th , 2017

Objective:

The purpose of this experiment is prepare us the concepts of measurement error and precision ad develop tools to quantify uncertainty.

Lab Measurements :

Obtain 100 resistors bath with 13Ω 1% error tolerance, measure the resistance using ohmmeter and repeat with 5% error tolerances resistor batch.

VD

R

1.0kΩ

V Set up the following circuit, and sweep the input voltage from 1-5 V in 0.1 V increments and store data.

Post lab:

EX#1

1% tolerance

mean = 13.2337

std = 1.0665

Percent error = 13.2337-13 13 *100%=1.7977%

5% tolerance

mean = 13.1538

std = 0.1497

Percent error = 13.1538-13 13 *100%=1.1831%

28575034290 1% tolerance resistors histogram

190500100965 5 % tolerance resistors histogram

According to the graph shown above, the data is not distributed in a Gaussian manner, this is because when conducting the experiment, there is some man made errors, such as point the pen in the wrong spot where it does not conduct very well.

EX#2

628650257175

Slope of best fit line: m = 0.0 4778

η= 1 m V t =837.149

I o = e b =0.0043A

Discussion( Junchen Liu )

This experiment presents us the simple concepts of measurement error and precision and develop tools to quantify uncertainty and tried to use information to analysis the data. I learned how to use the mean and the standard deviation of the measurements data to get the uncertainty.

Discussion( Micheal Kyriacou

From this experiment , I learned the concepts of how to measure errors and develop tools to quantify uncertainty. Also from this lab I learned how to use the information I obtain from the experiment to analyze the data .In order to get the percent of error which is the uncertainty, We need to make use of the mean and standard deviation.