The voltage ratio of a 120-V to 24-V transformer is 5:1.

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Multiple Choice

The voltage ratio of a 120-V to 24-V transformer is 5:1.

The voltage ratio of a transformer is the ratio of the input (primary) voltage to the output (secondary) voltage, which also equals the turns ratio. With 120 V on the primary and 24 V on the secondary, the ratio is 120:24. This simplifies to 5:1, so the voltage ratio is 5:1. This confirms a step‑down transformer, since the secondary voltage is lower than the primary. The other options wouldn’t match the given voltages.

The voltage ratio of a transformer is the ratio of the input (primary) voltage to the output (secondary) voltage, which also equals the turns ratio. With 120 V on the primary and 24 V on the secondary, the ratio is 120:24. This simplifies to 5:1, so the voltage ratio is 5:1. This confirms a step‑down transformer, since the secondary voltage is lower than the primary. The other options wouldn’t match the given voltages.

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