实验数据处理
1.霍尔电势差U与螺线管通电电流Im的关系图(x=17.0cm处)：
0 50 100 150 200 250 300 350 400 450 500
0 22.2 44.1 66.1 88.1 110.1 132 154.1 176 198 220
直线的斜率K'=0.4301 ;相关系数r=1
L=26.0 ±.1cm,N=(3000 20)匝，平均直径 D=3.5 ±.1cm 卩。=4n x10*-7H/m
|A2 ■ DA2
K = L 2 D 2 K =30.01(V/T)
出N
2.通电螺线管内磁感应强度分布测定（Im=250mA）
螺线内磁感应强度B与位置刻度X的关系
x/cm U1z /mV UZ /mV
Uz /mV B/mT
1
9.6
-10.1
10.1
0.34
1.5
13.8
-14.6
14.2
0.47
2
20.5
-21.3
20.9
0.7
2.5
30.9
-31.7
31.3
1.04
3
44.8
-45.5
45.15
1.5
3.5
60.8
-61.6
61.2
2.04
4
74
-74.9
74.45
2.48
4.5
83.3
-84.1
83.7
2.80
5
89.8
-90.7
90.25
3.01
5.5
93.4
-94.2
93.8
3.12
6
95.9
-96.5
96.2
3.21
6.5
97.7
-98.6
98.15
3.27
7
98.8
-98.6
98.7
3.29
7.5
100.8
-101.1
100.95
3.36
8
101.4
-102.3
101.85
3.39
10
105.2
-106
105.6
3.52
14
106.5
-107.1
106.8
3.55
16
107.3
-107.8
107.55
3.58
21
106.5
-106.8
106.65
3.55
24
104.8
-105.1
104.95
3.5
25
102.3
-102.6
102.45
3.41
25.5
100.5
-100.9
100.7
3.36
26
98.7
-99
98.85
3.29
26.5
96.6
-97
96.8
3.23
27
93.9
-94.2
94.05
3.13
27.5
89.2
-89.7
89.45
2.98
28
82.3
-82.9
82.6
2.75
28.5
70.9
-71.5
71.2
2.37
29
55.8
-56.3
56.05
1.87
29.5
39.8
-40.5
40.15
1.34
30
25.9
-26.7
26.3
0.88
B/mT 通电螺线管内磁感应强度分布图
5 10 15 20 25 30 X/cm