Chapter 68 of 2364 min read

Transformers

Why this is asked: An ideal transformer conserves power, not voltage or current individually — a step-up transformer that raises voltage by some factor drops current by that exact same factor, and transformers work only on AC, since they need a changing flux.

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Test yourself

•In an ideal transformer, the turns ratio is $\frac{N _{P}}{N _{S}} = \frac{1}{2}$ . The ratio $V_{S} : V_{P}$ is equal to (the symbols carry their usual meaning):

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