Resistivity Apparatus

Product Code: EM-8812


A current is established in a wire of known diameter, and the voltage drop across a section of the wire is measured. Students can calculate the resistance of the wire and the resistivity of the material.


  • Vary wire length: Slide-wire potentiometer pick-up makes it easy. Use the built-in scale to measure the length of the wire.
  • Vary wire diameter: Four different diameters of brass wire are included. Investigate the difference between resistance and resistivity. Interchange wires quickly and easily.
  • Vary wire material: Five different material wires are included. Investigate how resistivity depends on the wire material.
  • Storage: Built-in storage tray to hold wires.
  • Sample Wire: Wires are held securely and straight by the wire guides and lugs.
  • Slide Wire Probe: Spring-loaded wire probe slides easily along the wire, making contact at a single point.
  • Built-in cm Scale and slide wire probe make it easy to measure the voltage drop across various wire lengths.

What’s Included

  • 2x 30 cm long wires: Copper (1.0 mm diameter)
  • 2x 30 cm long wires: Aluminum (1.0 mm diameter)
  • 2x 30 cm long wires: Stainless Steel (1.0 mm diameter)
  • 2x 30 cm long wires: Nichrome (1.0 mm diameter)
  • 2x 30 cm long wires: Brass (0.5 mm, 0.8 mm, 1.0 mm, 1.3 mm diameter)


Small parts. Not for children under 3 years.

Software Required

This product requires PASCO software for data collection and analysis. We recommend the following option(s). For more information on which is right for your classroom, see our Software Comparison: SPARKvue vs. Capstone »

Interface Required

This product requires a PASCO Interface to connect to your computer or device. We recommend the following option(s). For a breakdown of features, capabilities, and additional options, see our Interface Comparison Guide »

Recommended Accessories

PASPORT Galvanometer PS-2160
Replacement Wires, Resistivity Apparatus EM-8813

Supporting Documents

Resistivity Apparatus Manual  English  513.24 KB