Conductive Shapes

Product Code: ES-9061


This set includes a conductive sphere with a hole in it. Demonstrate that static charge resides outside the surface of a conductive sphere by sampling the inside surface with the ball end of the proof plane. Also included is an oblong shape for demonstrating the difference in charge densities on a large-radius surface vs. a small-radius surface. The whole surface is at the same potential, and students seem surprised to find that the charge density is greater on the smaller end.


  • High quality nickel-plated ABS plastic shapes
  • Non-conductive polycarbonate rods and stable support base
  • Thumbscrew terminal for attaching a ground cable or lead from a voltage source.


  • Use a Proof Plane to sample charge on the conical shape
  • Using a Proof Plane to Sample Charge inside the Hollow Sphere

Supporting Documents

Conductive Shapes Manual English 430.74 KB

Recommended Accessories

Faraday Ice Pail ES-9042A
Charge Producers and Proof Plane ES-9057C
Electrostatics Voltage Source ES-9077
Basic Electrometer ES-9078A