Final answer:
A transformer with more turns on the primary than the secondary is called a step-down transformer.
Step-by-step explanation:
If there are more turns of wire on the primary windings of a transformer than on the secondary, the transformer is called a step-down transformer. This kind of transformer decreases voltage and increases current from the primary side to the secondary side. The transformer uses electromagnetic induction to transform voltages and currents, where the ratio of voltages across the primary and secondary coils is directly proportional to the ratio of the number of turns in the coils. In summary, a transformer with more primary turns than secondary turns steps down the voltage.