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How a wire’s resistance depends on its material, length and cross-section

How a wire’s resistance depends on its material, length and cross-section

LP3.3.3.2

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Description

In this experiment, the students determine the resistance of different metallic wires. The resistance wires to be studied were chosen in a way that the students realise that the resistance does not only depend on the material, but that length and diameter and thus the cross-sectional area also play a role.

Components of equipment sets

1	57681 4	Plug-in board safety socket, 20/10
1	50148 4	Bridging plugs STE 2/19, set of 10
1	56718 4	Wrapping plate for wires
2	579331 4	Plug-in holder STE
1	50186 4	Crocodile clip, polished
1	57913 8	Toggle switch STE 2/19
1	55046 4	Chrome-nickel resistance wire, 0.25 mm diameter, 100 m
1	55047 8	Chrome-nickel resistance wire, 0.35 mm diameter, 100 m
1	55042 4	Constantan resistance wire, 0.35 mm diameter, 100 m
2	500621 4	Safety experiment cable, 50 cm, red
2	500622 4	Safety experiment cable, 50 cm, blue
1	500624 4	Safety experiment cable, 50 cm, black
1	521488	AC/DC power supply 0...12 V/3 A
1	531120	Multimeter LDanalog 20

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How a wire’s resistance depends on its material, length and cross-section

Description

Components of equipment sets

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