1. What does a transformer actually trasnform?2.What does a step-ip transformer step up?3. In a transformer, how does the power input to the primary coil compare with the power output of the secondary coil?
It transforms voltage and current from the values that exist at the primary to the values that exist at the secondary. 2. It steps up voltage. 3. Ideally, the input and output power would be the same, that is the product of voltage and current would be the same even though the voltages and currents are different. I practical transformers there is resistance in the wire and energy loss in the core so that the output power is slightly less than the input power. The difference appears as heat in the transformer.
