Which displayed electrical symbol represents an SPDT switch?

The symbol representing an SPDT (Single Pole Double Throw) switch is indeed the correct choice. An SPDT switch has one input terminal and can connect to one of two output terminals, allowing for two different paths for current to flow. This is particularly useful in applications where you need to toggle between two circuits or states.

In many schematics, the symbol for an SPDT switch typically shows a single line (indicating the single pole) with two diverging lines (indicating the two throws). This design effectively illustrates the switch's functionality of selecting between two different connections based on its position.

The other options represent different types of switches or configurations. For instance, a single pole switch only has one position to control, while a double pole switch operates two separate circuits simultaneously. A three-way switch is used in conjunction with another three-way switch to control lights from two different locations, which is not the function of an SPDT. Thus, understanding the specific function and representation of an SPDT switch in schematic diagrams is critical in identifying the correct symbol.