What is necessary to determine the output voltage of a transformer?

To determine the output voltage of a transformer, it is essential to know both the input voltage and the turns ratio. The turns ratio is a critical factor as it reflects the relationship between the number of turns in the primary winding versus the number of turns in the secondary winding. This ratio directly influences how much the voltage is stepped up or stepped down when the alternating current (AC) flows through the transformer.

When you multiply the input voltage by the turns ratio, you can calculate the output voltage. For instance, if a transformer has a turns ratio of 10:1 and the input voltage is 120 volts, the output voltage can be determined as 120 volts multiplied by the ratio, which results in 12 volts. Therefore, knowing both the input voltage and the turns ratio is necessary for accurately calculating the transformer's output voltage. This understanding is crucial for anyone working with transformers to ensure they operate within the desired voltage levels for their specific applications.