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| First, we assume that the transformer is lossless. Therefore, the input power will be equal to the output power. The transformer is an energy conversion device to step up or step down the AC voltage.
In this case, V1 * I1 = V2 * I2 for the power conservation law. This has nothing to do with the Ohm's law.
If the transformer is connected to a load resistor of R. Then, I2 = V2/R. I1 = (V2/V1)* I2 = (V2/V1)*(V2/R) = (V2)^2/(R*V1) ... |
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