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Chapter ES1,2

PHY 158 Chapter ES1,2: PHY 158 CHAPTER ES1/ES2 LAB


Department
Physics
Course Code
PHY 158
Professor
Zhang Xingru
Chapter
ES1,2

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Experiment ES1/ES2
1
Section VI-1
To find p, we use
to find the value p. As a sample calculation




With this formula, we can tabulate p for different set of V1 and V2
V1(Volts)
V2(Volts)
p
20
0.3
0.9850
24
0.2
0.9917
9
0.1
0.9889
39
0.4
0.9897
31
0.2
0.9935




0.0032
 
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Experiment ES1/ES2
2
Section VI-3
We can tabulate data based on the experiment
V blue (volts)
Vwhite (volts)
Vboth (volts)
-20
20
0
-37
38
-0
-37
35
-2
To find sum of the electrometer(Vsum), we add both V blue and Vwhite. As a sample calculation
Vsum = V blue + Vwhite
Vsum = -20 + 20
Vsum = 0
Based on calculation, we can make a complete table that shows calculated sum of the
electrometer and experimental sum of the electrometer.
V blue (volts)
Vboth (volts)
Vsum (volts)
-20
0
0
-37
0
1
-37
-2
-2
This shows that estimated value and actual calculation are about the
same. There may be a small difference due to loss of electrons while
inserting charge producers into the pail.
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Experiment ES1/ES2
3
Section VI-4
We can tabulate data based on the experiment.
Vinsert (volts)
Vwithdaw (volts)
Vtouch (volts)
31
-31
4
23
-23
3
10
-10
1
25
-25
2
Different charge distribution based on different situation
1) When the proof plane is initially inserted into the pail
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