Answer:
The number of turns in the primary and secondary coil
Explanation:
Current is inversely proportional to voltage, therefore as current increases, voltage decreases. In the same way, if current decreases, the voltage will increase.
However, the key factor that determines the output of the voltage of a transformer is the number of turns of the coils, both the primary and secondary coils.
If the turns of the secondary coil is higher than that of the primary coil, the secondary voltage will be higher and this is called a step-up transformer.
Since current is inversely proportional to voltage, the secondary current is also determined by the turns of the coils and the load resistance.
