Electrician Red Seal · Question
A transformer has 480 turns on the primary winding and 120 turns on the secondary. If the primary voltage is 600V, what is the secondary voltage, assuming no losses?
The relationship between voltage and turns is Vp/Vs = Np/Ns. Rearranging for secondary voltage: Vs = Vp * (Ns/Np). Vs = 600V * (120/480) = 600V * 0.25 = 150V.
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Question: A transformer has 480 turns on the primary winding and 120 turns on the secondary. If the primary voltage is 600V, what is the secondary voltage, assuming no losses?
Answer options:
- 120 V ✅ 150 V
- 240 V
- 2400 V
Correct answer: 150 V
Explanation: The relationship between voltage and turns is Vp/Vs = Np/Ns. Rearranging for secondary voltage: Vs = Vp * (Ns/Np). Vs = 600V * (120/480) = 600V * 0.25 = 150V.
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