Principle

From the experimentally determined relationships
R  ∼ I with ρ and A
constant, and R  ∼ 1∕A with ρ
and l constant as well
as R ∼ l∕A the equation
R = ρ 
× l∕A was worked out
and resistivity was introduced as a material "constant". The
students should use this equation to experimentally determine the
quantity ρ for common conductor materials.

Benefits


No additional cable connections between the building blocks needed - clear arragned and quick setup

Contact saftey due to puzzle blocks system

Corrosion-free gold plated contacts

Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside



Tasks

How high is the resistivity of some metals?

Determine the resistivity of copper, iron and constantan.