Electrical IBEW Practice Test 2026 - Free IBEW Practice Questions and Study Guide

The correct response is related to the transformer's design and operation, specifically the turns ratio. In a transformer, the turns ratio is the relationship between the number of turns in the primary winding compared to the number of turns in the secondary winding. This ratio directly affects how voltage is transformed.

When the turns ratio is such that the primary winding has more turns than the secondary winding, the transformer reduces the voltage. This is known as a step-down transformer. The voltage reduction follows the principle that the voltage across the windings is proportional to the number of turns; hence, a lower number of turns on the secondary side results in a reduced output voltage compared to the input voltage on the primary side.

Understanding the transformer's function is crucial in electrical systems, particularly in applications where it is essential to lower voltage levels for usability in circuit designs or to meet safety standards.