![Experiment: Fine-Beam Tube (230 V, 50/60 Hz), 8000668 [UE3070700-230], 电子管的实验](/imagelibrary/UE3070700-230/UE3070700-230_01_Experiment-Fine-Beam-Tube-230-V-5060-Hz.jpg)
![Experiment: Fine-Beam Tube (230 V, 50/60 Hz), 8000668 [UE3070700-230], 电子管的实验](/thumblibrary/UE3070700-230/UE3070700-230_01_1200_1200_Experiment-Fine-Beam-Tube-230-V-5060-Hz.jpg)
| Thematic focus: .. |
| • | Demonstrate the deflection of electrons in a uniform magnetic field into a closed circular path |
| • | Determine the Helmholtz current IH as a function of the accelerating voltage of the electron gun U for a constant path radius r. |
| • | Determine the specific charge of an electron e/m from the measurements |
| Experiment description: .. |
| 3B 科技 产品型号 | 3B Scientific |
![15根安全实验导线套件，75mm, 1002843 [U138021], 电循环](/thumblibrary/U138021/U138021_01_140_140_15根安全实验导线套件-75mm.jpg)
![电压电源0-500 V (230 V, 50/60 Hz), 1003308 [U33000-230], 供电器](/thumblibrary/U33000-230/U33000-230_01_140_140_电压电源0-500-V-230-V-5060-Hz.jpg)
![模拟万用表 ESCOLA 100, 1013527 [U8557380], 手持模拟测量仪器](/thumblibrary/U8557380/U8557380_01_140_140_模拟万用表-ESCOLA-100.jpg)
![一对赫尔姆霍茨线圈, 1000906 [U8481500], 感应现象](/thumblibrary/U8481500/U8481500_01_140_140_一对赫尔姆霍茨线圈.jpg)
![高压电源5kV（230 V，50/60 Hz）, 1003310 [U33010-230], 供电器](/thumblibrary/U33010-230/U33010-230_01_140_140_高压电源5kV-230-V-5060-Hz.jpg)
![直流电源0 – 20 V, 0 – 5 A
(230 V, 50/60 Hz), 1003312 [U33020-230], 供电器](/thumblibrary/U33020-230/U33020-230_01_140_140_直流电源0-20-V-0-5-A-230-V-5060-Hz.jpg)
![功率函数生成器（230 V，50/60 Hz）, 1009957 [U8533600-230], 信号函数发生器](/thumblibrary/U8533600-230/U8533600-230_01_140_140_功率函数生成器-230-V-5060-Hz.jpg)
![成对安全实验导线，75cm, 2,5 mm², 1017718 [U13816], 实验用导线和电缆](/thumblibrary/U13816/U13816_01_140_140_成对安全实验导线-75cm-2-5-mm.jpg)
![Teltron 管座 S, 1014525 [U185002], 电子管 S](/thumblibrary/U185002/U185002_01_140_140_Teltron-管座-S.jpg)
![电子衍射试管, 1013889 [U185711], 电子管S](/thumblibrary/U185711/U185711_01_140_140_电子衍射试管.jpg)
![Red Laser Diode, 650 nm, 1003201 [U22000], 位于支架上的光学灯](/thumblibrary/U22000/U22000_01_140_140_Red-Laser-Diode-650-nm.jpg)
![袖珍型测量带，2米, 1002603 [U10073], 长度测量](/thumblibrary/U10073/U10073_01_140_140_袖珍型测量带-2米.jpg)
![Planck’s Constant Apparatus (230 V, 50/60 Hz), 1000537 [U10700-230], 杂项](/thumblibrary/U10700-230/U10700-230_01_140_140_Planck-s-Constant-Apparatus-230-V-5060-Hz.jpg)
![光控计时门, 1000563 [U11365], 传感器](/thumblibrary/U11365/U11365_01_140_140_光控计时门.jpg)
![Digital Spectrometer LD, 1018103 [U22028], 分光光度计](/thumblibrary/U22028/U22028_01_140_140_Digital-Spectrometer-LD.jpg)
![氮气光谱管, 1003414 [U41822], 光谱管和灯](/thumblibrary/U41822/U41822_01_140_140_氮气光谱管.jpg)
![SEK 基板, 1000789 [U8408035], 学生实验工具包](/thumblibrary/U8408035/U8408035_01_140_140_SEK-基板.jpg)
![Experiment: Planck’s constant (230 V, 50/60 Hz), 8000700 [UE5010200-230], Fundamentals of Atomic Physics](/thumblibrary/UE5010200-230/UE5010200-230_01_140_140_Experiment-Planck-s-constant-230-V-5060-Hz.jpg)
![Experiment: Electron Diffraction (230 V, 50/60 Hz), 8000704 [UE5010500-230], Fundamentals of Atomic Physics](/thumblibrary/UE5010500-230/UE5010500-230_01_140_140_Experiment-Electron-Diffraction-230-V-5060-Hz.jpg)