An AC adapter, AC/DC adapter, or AC/DC converter is a type of external power supply, often enclosed in a case similar to an AC plug.Other common names include plug pack, plug-in adapter, adapter block, domestic mains adapter, line power adapter, wall wart, power brick, and power adapter.Adapters for battery-powered equipment may be described as chargers or rechargers (see also battery charger).ther common names include plug pack, plug-in adapter, adapter block, domestic mains adapter, line power adapter, wall wart, power brick, and power adapter. Adapters for battery-powered equipment may be described as chargers or rechargers (see also battery charger).
How are a PhD and Professional Doctorate Different? In a PhD program, you'll focus your research on contributing new knowledge and theory to the body of knowledge in your field. In a professional doctorate program, you'll focus your research on the practical application of knowledge and theory that already exists within your field.
The PhD (Doctorate of Philosophy) and the EdD (Doctorate of Education) are the two terminal degrees -- that is, the highest degrees available -- in the field of education. They're equivalent in many ways, but are quite different in their focus of study and intended use.