What is a key characteristic of a step-down transformer?

A step-down transformer is specifically designed to convert high voltage electrical energy into low voltage electrical energy. This is achieved through its winding ratio—specifically, it has more turns of wire in its primary winding than in its secondary winding. This design allows the transformer to reduce the voltage while increasing the current proportionally according to the principles of electromagnetic induction.

Understanding this principle is essential because it highlights the main function of step-down transformers in practical applications, such as in power distribution systems where voltage needs to be lowered for safe use in homes and businesses. The correct choice captures this fundamental aspect, emphasizing the transformer's role in making high voltage electricity safe for everyday use.