In typical guitar wiring circuits, this type of pot is used for both volume and tone control (the actual ohm values of the pots vary with specific applications, although they are frequently the same for volume and control). Let’s put a couple of these 250K pots into a simple guitar wiring diagram that has one pickup, one volume control (V), and one tone control (T).
This wiring scheme is actually often used with vintage (1950s) Fender basses. (Note: In reality, the body of a pot is connected to ground. This is done in part as a convenient way to create a ground point and in part to reduce noise. In the first diagram below (Figure 5), we have not included this ground point in the interest of making it easy to visualize current flow through the circuit. In the second we have altered the diagram to illustrate the actual ground points).