4 Point Method / Measurement of low resistances / Ohm's Law Principle The resistances of various DC conductors are determined by recording the current / voltage characteristic. The resistivity of metal rods and the contact resistance of connecting cords are calculated. Benefits - Measurement at two different metals possible
- Conductivity rods can be used both for electrical and thermal conductivity experiments
- Measurement amplifier can be used for both AC and DC measurements and amplifies up to 10,000 times
Tasks - To plot the current / voltage characteristics of metal rods (copper and aluminium) and to calculate their resistivity.
- To determine the resistance of various connecting cords by plotting their current / voltage characteristics and calculating the contact resistances.
Learning objectives - Ohm's law
- Resistivity
- Contact resistance
- Conductivity
- Four-wire method of measurement
Scope of delivery |
Heat conductivity rod, Cu
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04518-11
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1
| |
Heat conductivity rod, Al
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04518-12
|
1
| |
PHYWE Universal measuring amplifier
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13626-93
|
1
| |
PHYWE Digital multimeter, 600V AC/DC, 10A AC/DC, 20 MΩ, 200 µF, 20 kHz, −20°C…760°C
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07122-00
|
2
| |
PHYWE Power supply, 230 V, DC: 0...12 V, 2 A / AC: 6 V, 12 V, 5 A
|
13506-93
|
1
| |
Connection box
|
06000-00
|
1
| |
Connecting cable, 32 A, red, various lengths
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07360-01
|
1
| |
Connecting cable, 32 A, blue, various lengths
|
07360-04
|
1
| |
Connecting cable, 32 A, red, various lengths
|
07361-01
|
2
| |
Connecting cable, 32 A, blue, various lengths
|
07361-04
|
1
| |
Connecting cable, 32 A, yellow, various lengths
|
07362-02
|
2
| |
Connecting cable, 32 A, blue, various lengths
|
07362-04
|
1
| |
Connecting cable, 32 A, yellow, various lengths
|
07365-02
|
2
|
|
Service
