Aggregate Demand. The AD curve shows the relationship between prices and the demand for output in an. economy. W can derive the AD curve in the following way. 1. The Monetarist View of AD. Monetarists believe that shifts in AD are cause primarily by changes in the money. supply. Using the equation of exchange: MV â¡ PY.
These terms have given rise to abbreviations for the types of switch which are used in the electronics industry such as  single-pole, single-throw  (SPST) (the simplest type, on or off) or  single-pole, double-throw  (SPDT), connecting either of two terminals to the common terminal.
A Direct Current circuit is a circuit that Electric Current flows through in one direction. DC is commonly found in many low-voltage applications, especially where these are powered by Battery. Most electronic circuits require a DC power supply. A Direct Electric Current flows only when the Electric Circuit is closed, but it stops completely when the circuit is open. A Switch is a device for making or breaking an Electric Circuit. While the Switch is closed, Figure 1(a), the circuit is closed and the Light Bulb turns On; while the Switch is opened, Figure 1(b), the circuit is open and the Light Bulb turns Off.