NEIEP Mechanics Practice Exam

Question: 1 / 475

What type of transformer has a primary current of 27 amps and a secondary current of 1 amp?

Step-down transformer

Step-up transformer

The situation described involves a primary current of 27 amps and a secondary current of 1 amp, which indicates that the transformer has reduced the current from the primary side to the secondary side. In electrical terms, when a transformer steps down the voltage, it consequently steps down the current, adhering to the principle of conservation of energy (ignoring losses).

For a step-up transformer, the primary current would be lower than the secondary current because it is increasing voltage while decreasing current. Since in this case the primary current is significantly higher than the secondary current, it clearly signifies that the transformer is converting higher current (with lower voltage) to a lower current (with higher voltage).

Thus, the correct classification for the transformer in question is a step-down transformer, as it effectively reduces the current and voltage from the primary side to the secondary side.

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Isolation transformer

Inverter transformer

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