A transformer has a primary winding of 200 turns and a secondary winding of 500 turns. If 20 volts are applied to the primary, what is the expected secondary voltage?

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Multiple Choice

A transformer has a primary winding of 200 turns and a secondary winding of 500 turns. If 20 volts are applied to the primary, what is the expected secondary voltage?

Voltage scales with the turns ratio in a transformer. For an ideal transformer, Vs/Vp = Ns/Np. Here the secondary has 500 turns and the primary has 200 turns, so Ns/Np = 500/200 = 2.5. With 20 volts applied to the primary, the secondary voltage becomes Vs = Vp × (Ns/Np) = 20 × 2.5 = 50 volts. So the secondary is about 50 volts. This also means the secondary current would be lower by the same factor to keep power roughly the same, assuming ideal conditions.

Voltage scales with the turns ratio in a transformer. For an ideal transformer, Vs/Vp = Ns/Np. Here the secondary has 500 turns and the primary has 200 turns, so Ns/Np = 500/200 = 2.5. With 20 volts applied to the primary, the secondary voltage becomes Vs = Vp × (Ns/Np) = 20 × 2.5 = 50 volts. So the secondary is about 50 volts. This also means the secondary current would be lower by the same factor to keep power roughly the same, assuming ideal conditions.

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