Electricity and
Magnetism > DC Circuits > RC Circuits
DCS# 5F30.10
CAPACITOR AND
LIGHT BULBS
APPARATUS
6 V battery
202-02-D1
three 6 V bulbs in sockets
202-19-E3
1 F 5 V capacitor
202-19-E2
switch
101-09-C2
DESCRIPTION
Charge and discharge the capacitor
through the light bulbs.
NOTES
The bulbs are nonohmic
so this is not a good quantitative demonstration. The bulb
resistance is
about 40 ohms at 6 V, so two or three in parallel are used to
speed things up
a bit. A (very nonohmic) bicolor LED can be used in
parallel with the incandescent bulbs to show the direction of
the
current.