Northwestern Physics Demos                                 Go back to Electrostatics 
DCS# 5C10.21NWU# ES-6Location: 10 C 1 & 2   
title: Parallel Plate Capacitor
aka:  Battery and separable capacitor

Description:
Plates are positioned close together and charged up with about 45 V from 9V battery pile.  When plates are separated, the electroscope attached to the plates registers, showing the larger potential.
   A book can be placed between the plates when separated to show the effect of a dielectric.

Question?
   What happens to the effective capacitance when the plates are separated?
    What happens to the effective capacitance when the book is inserted between the plates?
pix of device