In a transformer, primary and secondary windings have some resistance. Let,
Now, We can easily prove that the resistance of two winding can be transferred to any one of the two windings of the transformer.
Let,
fig-2
So, the loss
Therefore,
Similarly , equivalent primary resistance as referred to Secondary winding is R1’=K2R1.
In
fig-3
And In
Therefore, The Equivalent resistance as referred to secondary and primary are,
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