In simple electrical conductors, the current I which passes through the conductor is proportional to the applied voltage U. The constant of proportionality, the ohmic resistance R, is dependent on the length x of the conductor, its cross-sectional area A and the nature of the material. This relationship is to be investigated using constantan and brass wires.
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(115 V, 50/60 Hz), 8000612 [UE3020320-115], Charge transport and current](/imagelibrary/UE3020320-115/UE3020320-115_01_实验-欧姆定律-115-V-5060-Hz.jpg)
![实验: 欧姆定律
(115 V, 50/60 Hz), 8000612 [UE3020320-115], Charge transport and current](/thumblibrary/UE3020320-115/UE3020320-115_01_1200_1200_实验-欧姆定律-115-V-5060-Hz.jpg)
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![Experiment: Real Gases and Critical Point (115 V, 50/60 Hz), 8000592 [UE2040300-115], Gas laws](/thumblibrary/UE2040300-115/UE2040300-115_01_140_140_Experiment-Real-Gases-and-Critical-Point-115-V-5060-Hz.jpg)
![实验: 基尔霍夫定律
(115 V, 50/60 Hz), 8000614 [UE3020330-115], Charge transport and current](/thumblibrary/UE3020330-115/UE3020330-115_01_140_140_实验-基尔霍夫定律-115-V-5060-Hz.jpg)
![实验: 洛伦兹力
(115 V, 50/60 Hz), 8000620 [UE3030300-115], Magnetic fields](/thumblibrary/UE3030300-115/UE3030300-115_01_140_140_实验-洛伦兹力-115-V-5060-Hz.jpg)
![Experiment: Magnetic field of the Earth (115 V, 50/60 Hz), 8000623 [UE3030700-115], Magnetic fields](/thumblibrary/UE3030700-115/UE3030700-115_01_140_140_Experiment-Magnetic-field-of-the-Earth-115-V-5060-Hz.jpg)
![Experiment: Transformers (230 V, 50/60 Hz), 8000633 [UE3040500-230], Induction](/thumblibrary/UE3040500-230/UE3040500-230_01_140_140_Experiment-Transformers-230-V-5060-Hz.jpg)
![Experiment: Charging and Discharging a Capacitor (115 V, 50/60 Hz), 8000634 [UE3050101-115], Direct and alternating current (DC and AC)](/thumblibrary/UE3050101-115/UE3050101-115_01_140_140_Experiment-Charging-and-Discharging-a-Capacitor-115-V-5060-Hz.jpg)
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![实验：单狭缝衍射, 8000768 [UE4030100], Wave optics](/thumblibrary/UE4030100/UE4030100_01_140_140_实验-单狭缝衍射.jpg)
![实验：多重狭缝和光栅的衍射, 8000680 [UE4030200], Wave optics](/thumblibrary/UE4030200/UE4030200_01_140_140_实验-多重狭缝和光栅的衍射.jpg)