Objective: Verification of Ohm’s law
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.
![Experiment: Ohm’s Law (230 V, 50/60 Hz), 8000613 [UE3020320-230], Charge transport and current](/imagelibrary/UE3020320-230/UE3020320-230_01_Experiment-Ohm-s-Law-230-V-5060-Hz.jpg)
![Experiment: Ohm’s Law (230 V, 50/60 Hz), 8000613 [UE3020320-230], Charge transport and current](/thumblibrary/UE3020320-230/UE3020320-230_01_1200_1200_Experiment-Ohm-s-Law-230-V-5060-Hz.jpg)
![DC Power Supply 20 V, 5 A
(230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.jpg)
![Precision Dynamometer 5 N, 1003106 [U20034], Dynamometers](/thumblibrary/U20034/U20034_01_140_140_Precision-Dynamometer-5-N.jpg)
![Clamp with Hook, 1002828 [U13252], Clamps](/thumblibrary/U13252/U13252_01_140_140_Clamp-with-Hook.jpg)
![Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm², 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm-25-mm.jpg)
![Analogue Multimeter ESCOLA 30, 1013526 [U8557330], Hand-held Analog Measuring Instruments](/thumblibrary/U8557330/U8557330_01_140_140_Analogue-Multimeter-ESCOLA-30.jpg)
![Tripod Stand 150 mm, 1002835 [U13270], Bases](/thumblibrary/U13270/U13270_01_140_140_Tripod-Stand-150-mm.jpg)
![Resistance Apparatus, 1009949 [U8492030], Circuits](/thumblibrary/U8492030/U8492030_01_140_140_Resistance-Apparatus.jpg)
![Safety Experiment Leads, 75 cm, 2.5 mm², blue, red, (2 pcs), 1017718 [U13816], Experiment Leads and Cables](/thumblibrary/U13816/U13816_01_140_140_Safety-Experiment-Leads-75-cm-25-mm-blue-red-2-pcs.jpg)
![Calipers, 150 mm, 1002601 [U10071], Measurement of Length](/thumblibrary/U10071/U10071_01_140_140_Calipers-150-mm.jpg)
![Digital Stopwatch, 1002811 [U11902], Measurement of Time](/thumblibrary/U11902/U11902_01_140_140_Digital-Stopwatch.jpg)
![Universal Clamp, 1002830 [U13255], Clamps](/thumblibrary/U13255/U13255_01_140_140_Universal-Clamp.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Inclined Plane -
determination of holding friction, 1003213 [U30015], Linear Motion](/thumblibrary/U30015/U30015_01_140_140_Inclined-Plane-determination-of-holding-friction.jpg)
![Force Table, 1000694 [U52004], Statics](/thumblibrary/U52004/U52004_01_140_140_Force-Table.jpg)
![Pocket Measuring Tape, 2 m, 1002603 [U10073], Measurement of Length](/thumblibrary/U10073/U10073_01_140_140_Pocket-Measuring-Tape-2-m.jpg)
![Photo Gate, 1000563 [U11365], Sensors for Physics](/thumblibrary/U11365/U11365_01_140_140_Photo-Gate.jpg)
![Stainless Steel Rod 750 mm, 1002935 [U15003], Stainless Steel Rod](/thumblibrary/U15003/U15003_01_140_140_Stainless-Steel-Rod-750-mm.jpg)
![Calorimeter with Heating Coil, 150 ml, 1000822 [U8441020], Calorimeters](/thumblibrary/U8441020/U8441020_01_140_140_Calorimeter-with-Heating-Coil-150-ml.jpg)