Question

does a step up transformer increase input current or input voltage?​

Answer 1

Answer:

No, all it can do is increase or decrease the voltage. In a step up transformer the voltage goes up and the available current goes down. If the efficiency were 100% which it is not (about 97%) The input voltage times the input current will equal the output voltage times the output current

Answer 2

A step-up transformer is one that increases voltage, whereas a step-down transformer decreases voltage. Assuming, as we have, that resistance is negligible, the electrical power output of a transformer equals its input. This is nearly true in practice—transformer efficiency often exceeds 99%.