Question 15.9: Suppose that we have a 4700-V-rms ac source and we need to d...

Suppose that we have a 4700-V-rms ac source and we need to deliver 220 V rms to a load. Determine the turns ratio N_1/N_2 of the transformer needed.

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Rearranging Equation 15.51, we have

V_{2rms} = \frac{N_2}{ N_1} V_{1rms}      (15.51)
\frac{N_1}{ N_2} = \frac{V_{1rms}} {V_{2rms}} = \frac{4700}{ 220} = 21.36

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