Final answer:
A transformer with only one primary bushing is always connected to a load resistor on the secondary side. The primary winding is where the input voltage is applied, and the secondary winding is where the transformed output voltage is produced.
Step-by-step explanation:
A transformer with only one primary bushing is always connected to a load resistor on the secondary side. This is because the primary winding of a transformer is where the input voltage is applied, and the secondary winding is where the transformed output voltage is produced. The primary winding has an alternating voltage applied to it, which generates a time-varying magnetic flux that induces an AC output voltage in the secondary winding. So, the primary winding and the secondary winding are connected in such a way that the output voltage from the secondary winding can be used to power a load resistor.