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Answer Posted / blueraja
@Nishant: I apologize, the blog post I mentioned above
(answer #13) is down - I promise I will get it back up
within the next week to answer your question.
The quick-and-dirty answer is that Ohm's law tells you how
voltage and current relate in a single circuit, while the
power-conservation-law-for-transformers tells you how a
transformer relates voltage and current in two separate
circuits.
For a more in-depth explanation, refer to my blog post in
answer #13 in about a week :)
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