Electronic – How do transformer obey Ohm’s law

impedanceinductanceohms-lawtransformer

I am honestly confused, A transformer "Steps up the voltage and steps down the current" or vice versa. So how does it obey Ohm's law? for example, a transformer with a winding relation of 2:3, should make 4V 30mA become 6V 20mA, right? but I=V/R, so is there some internal resistance on the secondary winding? I know that impedance could be the answer, but does varying the input resistance varies the inductance of the secondary coil?

Best Answer

Ohm's law describes the behavior of a resistor; it doesn't say anything about an ideal transformer.

It is true that the resistance of the windings causes a power loss and a real transformer doesn't behave like an ideal transformer.

The resistance and inductance are not directly rated, so no, changing the resistance does not necessarily change the inductance.