The E-Field Proof Plane is a device for transferring charge from a charged object. Charge a plastic strip by rubbing with a cloth. Touch the charged object with the proof plane. Charge will be shared between the object and the Proof Plane so both will have the same charge sign. Show this using the E-Field Detector (MAG1416). If you are using a Faraday’s Pail, touch the inside of the Pail with the charged Proof Plane. Charge will be transferred and immediately move to the outside of the Pail. If the process is repeated, equal amounts of charge will be transferred each time. If the E-Field Proof Plane is charged by induction, the charge sign will be opposite and usually greater than by simple charge sharing. Show these effects using the E-Field Detector (MAG1416).
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