4 Point Method / Measurement of low resistances / Ohm's Law
Article No: P2410101
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