Mar 30, 2015
6.17 describe the structure of a transformer, and understand that a transformer changes the size of an alternating voltage by having different numbers of turns on the input and output sides
when there is an alternating current, the shape of the magnetic field around it increases and decreases with current.
when an ac current-carrying coil is placed near another wire coil, the changing magnetic field from the first coil is also applied to the second coil
as the magnetic field is constantly going in and out of the coil, the direction of current is constantly changing (alternating output)
the size of the induced voltage depends on the number of coils. if there are more coils, more voltage is induced and vice versa