by Colin McIntosh, The Cambridge English Dictionary is constantly being updated and expanded to reflect the interests of our users. One area of particular interest to our users is that of English Language Teaching (ELT), and a number of ELT terms have recently been added to the dictionary.y Colin McIntosh, The Cambridge English Dictionary is constantly being updated and expanded to reflect the interests of our users. One area of particular interest to our users is that of English Language Teaching (ELT), and a number of ELT terms have recently been added to the dictionary.
A diode is a one-way âvalveâ for electric current, analogous to a check valve for those familiar with plumbing and hydraulic systems. Ideally, a diode provides unimpeded flow for current in one direction (little or no resistance), but prevents flow in the other direction (infinite resistance).
Electrons do not flow, but they might be though of as 'flowing' as they transfer charges between them. The reason that electron flow is the opposite direction from current is that historical theories of electrical flow (current) treated it as a movement of positive charges rather than negative charges.he electrons always flow sin the direction opposite to the flow of current..hence, in this example, the electrons would move in counter clockwise direction.