Applications of a step up transformer
For the Transmission of electric power from a power station to the consumer, voltage is stepped up by using a step-up transformer. It minimizes the power loss in the transmission line.
Applications of a step down transformer
Step down transformer decrease the voltage to a safe value at the end of the transmission line where the consumer of electric power is located. A transformer can be used to step down the voltage from 240 v to 9 v for ringing the bell or operating a transistor radio.