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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
Components of equipment sets

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	576 81 4	Plug-in board safety socket, 20/10
1	501 48 4	Bridging plugs STE 2/19, set of 10
1	567 18 4	Wrapping plate for wires
2	579 331 4	Plug-in holder STE
1	501 86 4	Crocodile clip, polished
1	579 13 8	Toggle switch STE 2/19
1	550 46 4	Chrome-nickel resistance wire, 0.25 mm diameter, 100 m
1	550 47 8	Chrome-nickel resistance wire, 0.35 mm diameter, 100 m
1	550 42 4	Constantan resistance wire, 0.35 mm diameter, 100 m
2	500 621 4	Safety experiment cable, 50 cm, red
2	500 622 4	Safety experiment cable, 50 cm, blue
1	500 624 4	Safety experiment cable, 50 cm, black
1	521 488	AC/DC power supply 0...12 V/3 A
1	531 120	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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