As we switch off an appliance at home, the power supply is cut off.when we switch it on , the power is on.How does the transformer regulate /manage as per our requirement
A transformer simply changes one voltage to different voltage. There is some voltage change due to I*R in the transformer, but the transformer doesn't regulate the voltage.
1. You haven't specified your requirement. 2. Transformers don't regulate. Regulate is the job of a voltage regulator chip, like the LM7805. 3. Transformers don't manage either. People manage. People can also program computers to manage switches. Transformers just sit there, waiting for a closed loop for current flow on both primary coil and secondary coil. When both loops are closed, energy is transferred from one coil to the other by magnetic induction. When either loop is open, current ceases in the open coil, but still creates an alternating magnetic field in the closed loop, if the closed loop is the primary.
