Measuring resistivity of a wire
From R = ρL/S and S = πd²/4, use volt-ampere method then ρ = πd²U/(4LI).
DC circuitsInstrument reading, resistivity, Ohm’s law, EMF, RC.
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Measuring resistivity of a wire
Resistivity: R=ρl/S for uniform wire. This “Measuring resistivity of a wire” page is an MVP interactive sketch — formulas, controls, and live readouts in the browser; a fuller bench may follow.
Resistivity: R=ρl/S for uniform wire.
Key formulas
R=\rho l/S\rho=RS/lS=\pi r^2
How to use
- Adjust parameters in the left panel.
- Use play / pause and speed controls.
- Match right-side readouts to the formulas.
- Reset to return to the initial state.
Applications
- Measuring resistivity of a wire: Resistivity: R=ρl/S for uniform wire.
- In class, tune parameters for “Measuring resistivity of a wire”, then check against the textbook result.
FAQ
What does MVP mean on this page?
An interactive sketch with formulas and parameters. Polished Ready labs are the full bench experience.
What does the “Measuring resistivity of a wire” lab practice?
Tune parameters and match readouts to the “Measuring resistivity of a wire” relations — useful for prep and demos.
How do I connect meters?
Ammeter in series; voltmeter in parallel — watch polarity and range.
When does Ohm’s law apply?
For ohmic conductors I=U/R; nonlinear devices need their own curves.