JDAM Montage
https://youtu.be/AL5JLLQSTs0

V = R*I
P = V*I
******* V = Voltage
******* R = Resistance
******* I = Current

For a transformer
(Ns/Np) = (Vs/Vp) = (Ip/Is)
******* Np = number of turns on the primary windings
******* Ns = number of turns on the secondary windings

Try to memorize these relations...
You may need them. Who knows...