Question

Which transformer has the smaller voltage listed first

Answer 1

In transformers, the turns ratio is expressed as the primary turns to secondary turns. The transformer with the smaller voltage has its voltage listed first in the turns ratio, reflecting the proportionality between primary and secondary voltages.

In the context of transformers, the voltage ratio is typically expressed as the turns ratio, representing the ratio of the number of turns in the primary coil to the number of turns in the secondary coil. The voltage across the coils is directly proportional to the turns ratio.

When stating the turns ratio, the primary voltage is listed first, followed by the secondary voltage. Therefore, the transformer with the smaller voltage will have the voltage listed first. The turns ratio is commonly written as:

`\[ \text{Turns ratio} = \frac{N_{\text{primary}}}{N_{\text{secondary}}} \]`

So, if the turns ratio is 2:1, it means the primary voltage is twice the secondary voltage.