Purpose: Demonstrate the functioning of step up and step down transformers.


Setup: Connect the Variac power supply to the wall outlet and primary coil to the power supply. Wire two demo multi meters to measure the voltage across the coils. (Note:Use white multi-meter to measure the secondary coil). Apply some voltage across the primary coil, compare the ratio of voltages to the ratio of the turns in each coil. Replace a coil with different number of turns and check the voltages.