General Chemistry Laboratory 106 Lab Report 1 PDF

Preview

Summary

General Chemistry Laboratory 106 Lab Report 1. Hunter College Cuny...

Description

Name: Hina Shaheen Prof. Name: Yelena Zelenova Date: September 20, 2021 Ohm’s Law Introduction: Ohm’s Law states that the resistance across a load is the ratio of the potential difference (voltage) to the current. In this lab, we will verify Ohm’s law by using known resistors. We will use voltmeters and ammeters to measure potential difference and current. Calculations and Conclusions: A. I (A)

0.6

0.56

0.54

0.44

0.39

0.35

0.31

0.30

0.25

0.22

V (V)

4.1

4

3.7

3

2.7

2.5

2.2

2.0

1.8

1.6

B.

From this graph we can say that the material does obey Ohm’s law, because all of the points are near the line, it’s not perfectly on the line because maybe there are some reading errors. C. 𝐼1= 0.22

𝑅=

∆𝑉 ∆𝐼

=

𝑉1= 1.6 𝑉2 − 𝑉1 𝐼2 − 𝐼1

=

𝐼2= 0.35

2.5 − 1.6 0.35 − 0.22

=

𝑉2= 2.5 0.9 0.13

= 6.92 Ω

D. The slope that I got from my XL graph is = 7.14 Ω Conclusion; The slope from the XL graph and the slope that I calculated is not exactly the same, there is some difference. But the difference is not that big, the difference is just 0.2. And the reason for this error is maybe a reading error. Extra credit: I (A)

0.3

0.46

V (V)

3.1

3.1

There is no difference between the values when we change the circuit, because the resistance decreases while doing this....