يمكننى الاجابه عن هذا السؤال باللغه الانجليزيه لانى لم ادرس المصطلحات العلميه باللغه العربيه حتى لا يختلف المعنى
transformer work in an alternating current voltages, consist of two coils ,the first coil which connected to the source called primary turns and the other which connected to the load called secondary turns, when a varaible current passes through the primary coil its created a variable magnetic field which transformed to the secondary turns of the secondary coil by the iron core so a variable magnetic field produces a variable flux
from faradys law the e.m.f found in the secondary coil then an alternating current flow in the secondary circuit.
we notice here that transformer change voltage not the frequency also the physical phenomenon that take plase in this device called electomagnetic induction
