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The long distance power transmission lines reaching a certain power substation operate at 375,000 V. This...

The long distance power transmission lines reaching a certain power substation operate at 375,000 V. This potential difference has to be "stepped down" for local distribution through city power lines at 14,300 V. Substations use very large, oil-cooled transformers (a photograph of one is in the text) to accomplish this conversion. What is the ratio of primary to secondary windings in a transformer in such a substation?

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