I've got a question regarding transformer math. I would like someone else to confirm that I have the concept correct as I'm a tad bit confused and the many books and online content I've covered does not explicitly state what I'm asking.
(By the way, yes, this is my first post. I just found this forum and after having a look around, I decided to register. Think of this as my introduction, sort of.)
Anyway, the way I understand math related to transformers is this;
Voltage Primary (Vp) over Voltage Secondary (Vs) is equal (=) to Number of Turns Primary (Np) over Number of Turns Secondary (Ns).
(Vp over Vs = Np over Ns)
So if I have a transformer with an unknown Vp, an Vs of 25 volts, an Np of 20, an Ns of 100. The Vp (or voltage primary) would be 5 volts, correct??
(Vp = ??, Vs = 25v, Np = 20, Ns = 100)
Hopefully you understand this. If not, I'll draw up a quick diagram to perhaps make it more clear, as typing fractions is not possible. Thank you in advance for the assistance in clearing up my confusion.