To obtain 120 volts from a 120/240 volt transformer while using both secondary windings, how must the windings be connected?

To obtain 120 volts from a 120/240 volt transformer using both secondary windings, the correct method is to connect the windings in parallel. When connecting transformers or any similar electrical components in parallel, the voltage across each winding remains the same as the voltage rating of each winding, which is 120 volts in this case.

This setup allows for a greater current to be drawn while maintaining the same voltage level, making it ideal for applications that require a higher current output without increasing the voltage. In contrast, connecting the windings in series would double the voltage, resulting in 240 volts, which does not meet the requirement of obtaining 120 volts. Therefore, to achieve the desired output voltage of 120 volts effectively, parallel connection is the correct approach.