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?
