4 Point Method / Measurement of low resistances / Ohm’s Law
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.
- 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
PHYWE Universal measuring amplifier
Heat conductivity rod, Cu
Heat conductivity rod, Al
Connection box
Digital multimeter 2005
Connecting cord, 100 mm, yellow
Connecting cord, 32 A, 250 mm, red
Connecting cord, 32 A, 250 mm, blue
Connecting cord, 32 A, 500 mm, red
Connecting cord, 32 A, 500 mm, blue
Connecting cord, 32 A, 750 mm, yellow
Connecting cord, 32 A, 750 mm, blue
Connecting cord, 32 A, 2000 mm, yellow
PHYWE power supply, 230 V, DC: 0…12 V, 2 A / AC: 6 V, 12 V, 5 A
- 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.
- Ohm’s law
- Resistivity
- Contact resistance
- Conductivity
- Four-wire method of measurement