# Transformer currents in primary and secondary question

## Main Question or Discussion Point

I'm reviewing transformers and I have some confusion over the current

s is for secondary and p is for primary

I know that
Vs = Vp(Ns/Np)
and
Ip = Is(Ns/Np)

But does this mean for current in the primary coil, it has nothing to do with the inductance value or resistance (if I added a resistor before the inductor in the primary section)? V/Z = I does not work here?

If this is true what would the current be if I left the secondary terminal open so no current will flow. What do i use to calculate current in the primary coil? Is it affected by the inductance value then?

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vk6kro
I'm reviewing transformers and I have some confusion over the current

s is for secondary and p is for primary

I know that
Vs = Vp(Ns/Np)
and
Ip = Is(Ns/Np)

But does this mean for current in the primary coil, it has nothing to do with the inductance value or resistance (if I added a resistor before the inductor in the primary section)? V/Z = I does not work here?

If this is true what would the current be if I left the secondary terminal open so no current will flow. What do i use to calculate current in the primary coil? Is it affected by the inductance value then?