Electricity and Magnetism > AC Circuits DCS# 5G50.15
VARIABLE INDUCTANCE
variable inductor set-up
APPARATUS

signal generator/amplifier 202-17-A2
flashlight bulb
 202-19-E2
inductor with iron core 202-20-A

DESCRIPTION
Connect light bulb and inductor in series with signal generator.  Show that the light dims when the iron core is placed in the inductor.