Alternating voltage - step-up transformer - Explanation
If the number of turns in the primary coil is higher than the number of turns in the secondary coil, than it will act as a step-down transformer, and decrease the voltage.
Alternating voltage - step-up transformer - Explanation
If the number of turns in the primary coil is higher than the number of turns in the secondary coil, than it will act as a step-down transformer, and decrease the voltage.