While the schematic symbol of a transformer may look like two coils (called windings) placed next to each other, the magnetic coupling and orientation between these two coils is also indicated within its schematic symbol. Graphical transformer symbols must demonstrate that they are indeed coils of wire and not just a sequence of semicircles or loops.
Magnetic coils can take on many forms as an inductor, a winding, a choke, a solenoid, or the coils of a transformer with or without a magnetic core. Schematic diagrams use standard electrical symbols which are generally drawn to represent the types and operation of the components they symbolise. A schematic diagram is a graphical representation of an electrical or electronic circuit.
