Question

In a transformer, the output current and voltage are respectively 4 A and 20 V. If ratio of no. of turns in primary to secondary is 2:1, what is the input current and voltage?

Answer 1

If 240 volts rms is applied to the primary winding of the same transformer above, what will be the resulting secondary no load voltage. Again confirming that the transformer is a “step-down” transformer as the primary voltage is 240 volts and the corresponding secondary voltage is lower at 80 volts.