A transformer that decreases voltage by having more turns on the primary winding is called a ____ transformer.

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Multiple Choice

A transformer that decreases voltage by having more turns on the primary winding is called a ____ transformer.

In a transformer, the voltages relate to the turns ratio of the windings: Vs = Vp × (Ns/Np). If the primary has more turns than the secondary, the ratio Ns/Np is less than 1, so the secondary voltage is lower than the primary. This configuration decreases voltage, so it’s a step-down transformer. A step-up transformer would have more turns on the secondary, increasing voltage. An isolation transformer typically has a 1:1 ratio to provide galvanic isolation with little or no voltage change. An autotransformer uses a single winding with taps and can be configured to step voltage up or down, but the described setup with more turns on the primary specifically yields a step-down result.

In a transformer, the voltages relate to the turns ratio of the windings: Vs = Vp × (Ns/Np). If the primary has more turns than the secondary, the ratio Ns/Np is less than 1, so the secondary voltage is lower than the primary. This configuration decreases voltage, so it’s a step-down transformer.

A step-up transformer would have more turns on the secondary, increasing voltage. An isolation transformer typically has a 1:1 ratio to provide galvanic isolation with little or no voltage change. An autotransformer uses a single winding with taps and can be configured to step voltage up or down, but the described setup with more turns on the primary specifically yields a step-down result.

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