Question
What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?
Answer Options
- A) 360 volts
- B) 120 volts
- C) 40 volts
- D) 25.5 volts
Correct Answer: A
Explanation
The voltage ratio of a transformer is equal to the turns ratio: V_s/V_p = N_s/N_p. This is a step-up transformer since the secondary has more turns than the primary.
Using the given values, N_p = 500, N_s = 1500, and V_p = 120 \text{ VAC}: V_s = V_p \times \frac{N_s}{N_p} = 120 \text{ V} \times \frac{1500}{500} = 120 \text{ V} \times 3 = 360 \text{ volts.} The voltage output of the secondary winding is 360 \text{ volts}.
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