5K30.25 - V vs I in a Transformer Primary and Secondary
Demonstrate the change of inductance and current on the Priamary vs the voltage rise in the secondary of a transformer as the inductance of the transformer is changed
Normal operation has one 100W light bulb attached parallel to the primary (plugged into AC switch). A second 100W light bulb is hooked to the secondary. When the AC switch is turned on and the variac slowly ramped up, you should see the effect of either the step up or step down values. The comparison is voltage into the first light bulb vs. the voltage into the second light bulb.
Instructions Turn on the power switch to the transformer assembly with the top core piece removed. Note that the Primary series bulb illuminates brightly and the Secondary bulb does not illuminate at all, as the transformer has very low inductance .Slowly slide the top core across the two ends of the core and note that as the magnetic flux is contained in the core the Primary bulb gets dimmer and the Secondary bulb illuminates.