To ensure that the minimum amount of power is lost from the cables: the cables are thick so that their resistance is low high voltages are used to reduce the current through the transmission lines ...

A great example is this simple wireless AC current detector from [NEW PEW]. The circuit is a simple one, and a classic. The spring from a ballpoint pen is soldered to the base of a BC547 ...

This, however, is not the case, as they need around 100 volts of AC current to allow them to light up. For a battery-powered solution, this means converting the battery’s DC power to AC.

An explanation of the difference between direct and alternating current. The clip includes a short historical outline of the work of Thomas Edison and Nikola Tesla. This is followed by an ...