Electrician's Licensing Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

If a transformer has a voltage ratio of 8:1 and an input voltage of 120V, what will be the output voltage?

15 volts

To determine the output voltage of a transformer with a voltage ratio of 8:1 and an input voltage of 120V, you can utilize the relationship defined by the voltage ratio. In a transformer, the voltage ratio indicates how the voltages are related between the primary (input) and secondary (output) windings.

With a voltage ratio of 8:1, this means that for every 8 volts in the primary winding, there is 1 volt in the secondary winding. Therefore, when you have an input voltage of 120V, you can calculate the output voltage by dividing the input voltage by the voltage ratio (8).

This calculation would be:

Output Voltage = Input Voltage / Voltage Ratio = 120V / 8 = 15V.

Thus, the output voltage of the transformer is indeed 15 volts.

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30 volts

60 volts

120 volts

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