Physics – 4.5.6 The transformer | e-Consult
4.5.6 The transformer (1 questions)
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Given:
- Turns ratio (Ns/Np) = 10:1
- Ip = 5.0 A
- Vs = 125 V
Relationship between primary and secondary voltage and current in an ideal transformer:
Vp / Vs = Np / Ns = 1 / (Ns / Np)
Calculation:
Vp = Vs * (Np / Ns)
We know Ns/Np = 10, so Np/Ns = 1/10
Vp = 125 V * (1/10)
Vp = 12.5 V
Answer: The primary voltage is 12.5 V.