In a step-up transformer, how does the voltage compare between the primary and secondary sides?

In a step-up transformer, the primary and secondary are designed to transform voltages from one level to another. The main function of a step-up transformer is to increase the voltage from the primary side to the secondary side. This transformation occurs through electromagnetic induction, where the number of turns of wire on the primary coil is fewer than that on the secondary coil.

The voltage increase can be described by the relationship of the turns ratio, where the voltage on the secondary side is proportional to the number of turns on the secondary coil compared to the primary coil. As a result, it is established that if the secondary coil has more turns than the primary coil, the voltage output on the secondary side will be greater than that of the primary side.

Because of this design principle, when a step-up transformer is functioning correctly, indeed, the secondary voltage will always be greater than the primary voltage. This characteristic differentiates it from other types of transformers that could either have equal output or a lower output voltage when compared to the input.