In a transformer Np = 500, Ns = 5000. Input voltage is 20 V and frequency is 50 Hz. What are the output voltage and frequency ?

Question

In a transformer Np = 500, Ns = 5000. Input voltage is 20 V and frequency is 50 Hz. What are the output voltage and frequency ? (A) 200V, 40Hz (B) 400V, 50Hz (C) 200V, 0Hz (D) 150V, 40Hz

Tardigrade Admin · Accepted Answer

Using (Es/Ep) = (Ns/Np): Es = (Ns/Np) × Ep Putting the given values Es = (5000/500) × 20 = 200 V Frequency in a transformer remains the same so the output frequency is 50 Hz.

Q. In a transformer $N_{p}$ = 500, $N_{s}$ = 5000. Input voltage is 20 V and frequency is 50 Hz. What are the output voltage and frequency ?

200V, 40Hz

400V, 50Hz

200V, 0Hz

150V, 40Hz

Using $\frac{E _{s}}{E _{p}} = \frac{N _{s}}{N _{p}} : E_{s} = \frac{N _{s}}{N _{p}} \times E_{p}$
Putting the given values $E_{s} = \frac{5000}{500} \times 20$ = 200 V
Frequency in a transformer remains the same so the output frequency is 50 Hz.

Q. In a transformer Np​ = 500, Ns​ = 5000. Input voltage is 20 V and frequency is 50 Hz. What are the output voltage and frequency ?