A transformer with a 1:1 turns ratio and a 240 V primary delivers what secondary voltage?

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Multiple Choice

A transformer with a 1:1 turns ratio and a 240 V primary delivers what secondary voltage?

Explanation:
Voltage on the secondary follows the turns ratio: Vs = Vp × (Ns/Np). A 1:1 ratio means Ns equals Np, so the secondary voltage equals the primary voltage. With a 240 V input on the primary, the secondary will be about 240 V in an ideal transformer. The only way to get 120 V or 480 V is a different turns ratio (for example, 1:2 would give 120 V, and 2:1 would give 480 V). In real transformers, losses are small, so the secondary voltage is still essentially the same as the primary under ideal conditions.

Voltage on the secondary follows the turns ratio: Vs = Vp × (Ns/Np). A 1:1 ratio means Ns equals Np, so the secondary voltage equals the primary voltage. With a 240 V input on the primary, the secondary will be about 240 V in an ideal transformer. The only way to get 120 V or 480 V is a different turns ratio (for example, 1:2 would give 120 V, and 2:1 would give 480 V). In real transformers, losses are small, so the secondary voltage is still essentially the same as the primary under ideal conditions.

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