In order to calculate the output voltage of a transformer, divide the input voltage by the __________.

The output voltage of a transformer is determined by its turns ratio, which is the ratio of the number of turns of wire on the primary coil to the number of turns on the secondary coil. This turns ratio directly impacts how the voltage is transformed from the input side to the output side. In a step-up transformer, for example, the turns ratio is greater than one, resulting in an output voltage that is greater than the input voltage. Conversely, in a step-down transformer, the turns ratio is less than one, leading to a lower output voltage.

When you divide the input voltage by the turns ratio, you can effectively calculate the expected output voltage for a transformer. This relationship is part of the fundamental operation of transformers, which rely on electromagnetic induction and the physical characteristics of coil turns to alter voltage levels. The other options, such as resistance, input current, and frequency, do not directly influence the output voltage calculation in the same manner as the turns ratio does.