gaps.
A ______________ is a device that can change the potential difference or voltage of an alternating current. A ___________ transformer increases the voltage while a ___________ transformer reduces the voltage A basic transformer is made from two coils of wire, a __________ coil from the alternating current (ac) input and a _______________ coil leading to the ac output. The coils are not ________________ connected. Instead, they are wound around an ______________. This is easily ____________ and can carry magnetic fields from the primary coil to the secondary coil. Transformers use electromagnetic _______________ to change the voltage of alternating currents. The voltage and current changes can be calculated, as the power transfer is _______________.
transformer step-up primary secondary
electrically iron core magnetized induction
constant alternating step-down voltage