Physics Lab Report:
Report for Experiment ES1: Introduction to Electrostatics
VI(1)
Tabulate V-2 (given data)
#
V1
(volts)
6.8
7.5
9.6
8.2
6.9
1
2
3
4
5
V2
(volts)
-0.1
-0.1
-0.4
-0.5
-0.3
p=1(V2/V1)
1.014705882
1.013333333
1.041666667
1.06097561
1.043478261
P average = 0.98976 no units
σp = .01 no units
p ± σP = .99 ± .01
VI(2) (given data)
V-3
data

#
V1/4 (volts)
V1/2 (volts)
V3/4 (volts)
Vbottom (volts)
Vtouch (volts)
1
2
3
4
28
41
27
20
30
42
29
20
28
40
29
20
29
41
31
20
34
42
31
21
Calculate the ratio of electrometer reading at that depth to the electrometer reading after
touching the bottom of the pail.
V1/4 / Vtouch
0.82353
0.97619
0.87097
0.95238
V1/2 / Vtouch
0.88235
1.00000
0.93548
0.95238
V3/4 / Vtouch
0.82353
0.95238
0.93548
0.95238
Vbottom / vtouch
0.85294
0.97619
1.00000
0.95238
VI(3) (given data)
V-4
data

#
Vblue (volts)
Vwhite (volts)
Vfinal (volts)
sum of blue and
white
1
-20
20
0
0
2
-37
38
0
1
3
-37
35
-2
-2
When you add the blue and the white charge together I would expect to get a charge of zero.
This is because of the conservation of charge. The numbers do match the observed results as
they are producing numbers that are about zero. This is because the charge was conserved well.
#
Vinsert
Vground
Vwithdr
Vfinal
1
2
3
4
31
23
10
25
0
0
0
0
-31
-23
-10
-25
4
3
1
2
VI(4) (given data)
V-5
data
VI(5) (given data)
Transfer to Pail
n (charge
transfers)
5
5
5
10
10
10
15
15
15
20
20
20
25
25
25
Transfer to Shield
n (charge
transfers)
5
5
5
10
10
10
15
15
15
20
20
20
25
25
25
v (volts)
14
17
16
30
33
33
42
48
48
59
61
52
72
76
75
v (volts)
0.3
0
0
0.3
0
0
0.4
0
0
0.4
0
0
0.5
0
0
V vs. Number of Charge Transfers to the Pail
80
70
y = 2.8533x + 2.2667
V (volts)
60
50
40
30
20
10
0
0
5
10
15
20
Number of charge transfers to Pail
25
30
V vs Number of Charge Transfers to Shield
0.6
0.5
V (volts)
0.4
0.3
y = 0.0033x + 0.0767
0.2
0.1
0
0
5
10
15
20
Number of charge Transfers to shield
25
30
Physics Lab Report
Report for Experiment ES2: Electrostatic Charge Distributions
VI(1)
V-1
ϴ = 90⁰
Position ɸ (deg.)
0
45
90
135
180
QA = 0
V (volts)
-3.2
-1.5
-1.2
3.1
3
ϴ = 45⁰
Position ɸ (deg.)
0
90
180
QA = 0
V (volts)
-0.9
-0.7
3.4
QA < 0
V (volts)
-9.0
-7.0
-4.0
-2.0
-2.0
ϴ = 45⁰
Position ɸ (deg.)
0
90
180
QA < 0
V (volts)
-5.0
-3.0
-2.0
QA > 0
V (volts)
3.0
4.0
5.0
7.0
8.0
ϴ = 45⁰
Position ɸ (deg.)
0
90
180
QA > 0
V (volts)
5.0
5.0
8.0
V-2
ϴ = 90⁰
Position ɸ (deg.)
0
45
90
135
180
V-3
ϴ = 90⁰
Position ɸ (deg.)
0
45
90
135
180
V-4
ϴ = 90⁰
QA > 0, VB = 0
ϴ = 45⁰
Position ɸ (deg.)
0
45
90
135
180
V (volts)
3.0
4.0
4.0
4.0
4.0
Position ɸ (deg.)
0
90
180
QA > 0, VB =
0
V (volts)
4.0
4.0
4.0
VI(2) Sketches of relative charge density
Indicate where angles are on sphere A and indicate direction to sphere B
VI(3)
V vs. ɸ (ϴ = 90 degrees)
10
8
6
V (volts)
4
QA = 0
2
QA < 0
0
-2 0
50
100
150
200
-4
QA > 0
QA > 0, VB = 0
-6
-8
-10
Position ɸ (degrees)
V vs. ɸ (ϴ = 45 degrees)
10
8
V (volts)
6
4
QA = 0
2
QA < 0
QA > 0
0
-2
0
50
100
-4
-6
VI(4)
Case one: A = 0
Position ɸ degrees
150
200
QA > 0, VB = 0